Logie's Spring Migration |
Resume |
Logie left her nest on 4th August 2007 and
arrived at Roxa island in the Guinea Bissau archipelago
on 28th September. Her migration flight was 5695
kilometres south; her daily flights ranged between 65
and 756 kilometres. The longest being her first flight,
after her extended stop-over on the Solway, from
southern Scotland to France. Her average daily
distance flown over her 18 day migration was 298
kilometres; her average flying time was 8 to 9 hours at
a speed of 33 to 37 kilometres per hour. The
shortest direct distance between her wintering site and
her nest in Scotland is 5198 kilometres (3229
miles).
Throughout the winter
she has remained in a very small area of this tropical
island; perching mainly in one big tree in coastal
woodland, not far from the sea. Once or twice a day, she
made flights of up to a kilometre to catch fish in the
South Atlantic Ocean.
See below for details
of her autumn migration and wintering - this table will
now give her return migration. The satellite radio is
working well and giving hourly GPS fixes of her
location, and also details of her altitude in metres
above sea level, and if she is flying, the direction and
speed . |
11th March |
Her behaviour
is changing in the last couple of days. She is spending
more time perched in trees along the shoreline, and
yesterday made her longest recorded flight of the
winter, when at midday she was 5.5 kilometres to the
north, flying west at 41 km/h at 66 metres altitude,
while 6 hours later she was 1.5 kilometres south of her
main site, flying at 45 km/h towards her main roost
tree. |
12th
March |
Logie has started her
migration!! She roosted overnight on her usual
tree; at 10 am she was perched 500 metres to the south
on one of her normal daytime roosts, then back at main
roost at 11am. Maybe she had caught and eaten a morning
fish, because at midday she was 4 kilometres to the
north, very close to her position of 10th, but this time
she was flying NNE, at 50 km/h at an altitude of 258
metres. She was off!
|
12th March |
An hour later
she was flying NNE at 57km/h low over the sea to Bolama
Island; at 2pm she was crossing from Bolama to mainland
Guinea Bissau 53 kilometres from her winter quarters.
She was circling and gaining height to 233 metres. Two
hours later she had crossed the wide estuary of River
Corubal, about 40 kilometres upstream from the capital,
Bissau. By now she was flying over woodlands and
villages at 564 metres altitude. At 5 pm, she had
covered another 47 kilometres NNE and was flying
at 47 km/h in a NE direction at 900 metres. Half an hour
later she crossed into SENEGAL and was just north of
Lengueto. Her speed was recorded as 80 km/h, heading
NNE, but she was probably descending fast towards
woodlands 10 kilometres further north where she roosted
for the night by 7pm.
The first leg of her
great migration was 221 kilometres and she flew for just
over 6 hours at an average of 36 km/h. The weather was
ideal for starting her migration; clear conditions,
rising pressure and light winds 16 km/h from the west.
The temperature up to 79F.
The map shows her
first day's migration - compare the more direct heading
northwards for home, compared to the autumn migration
(yellow line).
|
13th
March |
Stayed at her overnight roost
until 0900GMT, then moved 8.5 kilometres north by 10am ,
when flying up a small river valley. Last
transmission in this sequence. A break in GPS
readings until 2pm by which time she had overflown The
Gambia and was 17 kilometres into northern Senegal, west
of Tambacounda. The land here is relatively low woodland
and scrub, yet Logie was flying at 1145 metres, and an
hour later she was still at 1392 metres in the Matam
region, but from there would have seen the Senegal
river, which she reached at 6pm, when she was flying
slowly east near Ouro Sogui. An hour later she was at
her roost site on a big oxbow lake. Her day's
migration was 348 kilometres and her crossing over the
river Senegal is 133 kilometres upstream from her autumn
crossing. The weather at Matam is clear skies,
full sun, light 10 km/h W to NW winds, hot at 38C.
Today, 14th she should pass into Mauritania.
13th
March migration - 348 kilometres
It's interesting she
was flying during the day at over 3000 feet above the
land - not sure why - to get a view?, avoiding harassing
birds or fires, or just for a change!
Logie's roost site 13th - 14th
March on Senegal River |
14th March |
Logie moved
late last evening to a roost 500 metres north; at 5 am
she moved one kilometre, then at 7-8am she was 500
metres north in the old river lakes. At 9am she was
beside a small lagoon 2 kms south probably eating a
fish, because by 10 am she had started her day's
migration, being nearly 5 kms NE and into MAURITANIA,
flying E at 43km/h. She flew on slowly and at 1pm was
approaching Mbout lake at 50 km/h and had climbed to 611
metres altitude. She was north of the lake an hour later
and by 3 pm she was flying over the Massif de l'Assaba
at 79km/h NNE at an altitude of 943metres.
At 4pm, she was still
nearly a 1000 metres above the surrounding land, and had
crossed the highway from Kiffa to Aleg, near El Ghayra.
She continued flying strongly northwards at 1400 metres
at 50 to 78kms/h, passing over broken ground containing
villages, small lakes, date palms but mainly
semi-desert. At 6pm she was heading for Matmata, and by
7pm she was roosting at 330 metres altitude in remote
rocky country, 80 kilometres SW of Tidjikja. Her
total day's flight was 313 kilometres. |
15th March |
The first
transmission was at 1000GMT, suggesting her roost might
have been in an obscured cliff without GPS
readings. She was then perched 4 kms north of her
roost, but an hour later she was actively migrating and
had corrected her heading to the NNW. Again the morning
speed was modest, flying at 35 km/h but covering only 11
and 25 kilometres in succesive hours. Appeared to be
quite a lot of soaring flight.
At 1pm she had climbed
to over a thousand metres and had passed to the east of
Ksar el Barka. At 2pm, she had crossed the plateau
and was flying over sand deserts and big dunes.
Now she started to speed up and had flown 61 kilometres
north between 3pm and 4pm. At 5pm, east of Chinquetta
and was flying at 79km/h north at 224 metres. At 6pm she
had regained height again over the next plateau of rocks
and for the next two hours was at 1830 metres. Between
7pm and 8pm she had passed over a series of cliffs to
roost in sandy deserts to the north at just 278 metres.
Her roost site was 47 km west of Ouadane and 66 kms west
of the amazing Richat Structure in the Mauritanian
deserts. Her day's migration was 339 kilometres.
Roost
site on 15th -16th March - how very different to Isla
Roxa and her nest site in Scotland |
16th
March |
Logie has now travelled 1442
kilometres (900 miles) in three and a half days. The map
shows this part of the migration (white line) and
compares it to the autumn passage (yellow line). It is
further east into the Sahara Desert and in autumn she
took six days to fly the same distance.
|
16th March |
Logie stayed
at her roost until 9am - she was either tired or there
were dust storms. At 10am she was perched 800
metres NE. At 11am she was 7 kilometres NNE, flying N at
43km/h and had gained height from 273 metres to 1178
metres - could this be to escape dust. Over the next two
hours she was flying over sand deserts but only making
20 and 22 kilometres. The wind is given as a headwind of
19 km/h over the desert.
There was a
break in the sequence of transmissions, and at 5 pm she
was 157 kilometres further north, flying NNE at 70km/h
at an altitude of 1594 metres; she had passed 50
kilometres east of the huge iron ore mine at Zouerat. At
6pm, she was continuing to fly fast at 69km/h and
heading NNE. She was not far from Western Sahara and had
crossed her southwards track. A GPS fix for 8pm
(received next morning) showed she had flown 23
kilometres north and was roosting in a vast open stony
desert (and was still in the same place at 0600GMT next
morning). Her day's journey was 258
kilometres. |
|
How do we get such
accurate locations?
Several people have asked how we get our
data so quickly
Tiny satellite radios,
called PTTs, have been designed and manufactured in
recent decades for carrying out research on wildlife. We
use radios, made by Microwave Telemetry in Columbia, USA
( http://www.microwavetelemetry.com/ ). Each PTT has a unique identification
number supplied under our conservation agreement with
Argos CLS, the French Satellite Tracking company based
in Toulouse, France ( www.cls.fr/welcome_en.html ).
The newest radios have GPS technology so that the
positions of the bird are extremely accurate (within 18
metres), and they also record speed, altitude and
course. A solar panel keeps the battery charged.
The radio is attached to the bird’s back
by a lightweight harness, like a tiny rucsac, and is
programmed to take GPS readings at hourly intervals and
then at intervals of between 1 and 10 days to transmit
data. CLS Argos have satellites which circle the earth,
mainly collecting information from ocean weather buoys,
and they pick up the signals. We can connect to their
website and database, and extract our data using
dedicated passwords. It’s possible to open my laptop on
my desk and receive information transmitted an hour
earlier from Africa. Then I load the data into various
different files and download one set of coordinates into
the fantastic GoogleEarth mapping system ( www.GoogleEarth.com ) – it’s all very
amazing.
The
radios are expensive (Logie's radio was funded by
Talisman Energy in Aberdeen) and for each day's data we
pay a monthly charge to CLS Argos. Donations to
our conservation studies would be very welcome for this
and future projects. |
17th
March |
Logie stayed at her roost site
until 9am, then moved 2 kilometres NNE, and at 1100 was
starting her migration again, being 5 kilometres to the
NE and flying at 41km/h and gaining height over the
desert. No further GPS signals until 3pm when she was
120 kilometres further north, flying N at 78km/h at an
altitude of 1214 metres. Soon she flying over the Rich
Mountains and about 4.40pm she passed the remote town of
Bir Moghrein in northern Mauritania. This is a remote
mountainous country of black rocks and enormous
crater-like depressions along the border - some
travellers say it likes the moon!
At 6pm she was flying
at 53km/h at an altitude of 1964 metres, way above the
land surface, and within half an hour or so she was
descending to a roosting area just 8 kilometres short of
the Moroccan border. Here the land slopes into Morocco
and there are a scattering of bushes - on one of which
she probably roosted. Her day's flight was 305
kilometres and she had light tail winds, clear skies and
hot sun.
|
18th
March |
Signals
came in late. Logie stayed at roost until 9am, and by
10am, had moved to perch about 7kilometres north and
just one kilometre south of the Western Sahara/Moroccan
border. At 11am, she was 22 kilometres further on
her migration, flying at 35 km/h NNE, and an hour later
had speeded up and was flying NE at 57km/h; then
she started to climb and crossed her southward autumn
track over the Hammada desert.
At 1pm, she as flying
at 62 km/h, heading just east of north at an altitude of
1543 metres. An hour later, she was 63 kilometres
further north, flying at 47 km/h at 1391 metres, so she
was continuing a fast high altitude migration (for an
osprey). At this time she would have seen the Anti Atlas
mountains ahead of her, sunny skies were clear with
light westerly tail winds drifting her to
NNE.
At 3pm she was
59 kilometres further north in MOROCCO, flying 64 km/h
just east of north at 1464 metres; an hour later she was
heading for ranges of hills called Jebel Bani, south of
Assa. At 5pm turned along the southern ridges and was
travelling at 86km/h, NNE at 704 metres. Soon she
crossed into ALGERIA. By 6pm she was roosting on the
south-east slopes of the ridge, facing the desert. Her
day's flight was 344 kilometres (215 miles) over the
deserts, but nowhere to catch fish.
Logie's track leaving
Mauritania, crossing into Western Samara & Morocco,
and finally before dusk into Algeria. During the day she
crossed her autumn track (yellow line). |
19th
March |
At 8am, this morning Logie was
perched on lower slopes of the Jebel, then moved 3
kilometres by 9am; and by 10 am had set off on migration
and was 34 kilometres further on. Map of roost site
shows Algerian border in yellow on left.
|
19th March |
Logie crossed from Algeria back into
Morocco and at 11am was flying N at 59km/h at 628
metres; she continued north and two hours later was
flying at 87km/h at 1102 metres. By 2pm she had dropped
down into a valley before climbing again to 1294 metres
by 3pm and was heading north for Ouarzazate with its
large freshwater reservoir lake. At 4pm she was flying
over the lake, presumably desperate to catch and eat a
fish, the first since leaving the Senegal river 5 days
earlier on the morning of the 14th March. At 5pm, she
was perched on the north shore of the big reservoir,
probably eating a fish and then she back south to roost
two kilometres out into big dunes in the desert.
She has successfully crossed the great Sahara Desert
again and now heads into the Atlas Mountains. Her
migration continues and today's flight was 308
kilometres.
Ouarzazate is an
important Moroccan town to the west of the lake; a busy
place for travellers and known as the 'door of the
desert'. It's close to the Atlas mountains and the Draa
valley; and lies at 1160 metres above sea level. Last
night high clouds had extended over the mountains; and
today the weather at the lake is partly cloudy, clearing
to sun later, with light west winds 16km/h and
temperature of 68F/20C. |
19th March |
At dusk she moved 6
kilometres SW to roost along the side of a small river
with scattered trees and bushes. Interestingly, this was
within 50 metres of where the Finnish male osprey Pete
roosted overnight on 11th/12th October 2007. He wintered
in the Senegal but has not yet started his return
migration.
See Pertti Saurola's website for
details at www.fmnh.helsinki.fi/english/zoology/satelliteospreys/index.htm |
20th
March |
Logie stayed at her roost until 8am,
then at 10am she was perched 5.4 kilometres north, just
south of the lake at Ouarzazate. Possibly she had fished
by then. At 11am, she was 26 kilometres north flying
north up over the High Atlas mountains, she was flying
NW at 69 km/h and was at 1708 metres. She was heading
for lower passes west of the highest mountains which
rise to 4000 metres. An hour later she had passed a high
level lake and was flying at 59km/h at 1027 metres. At
1pm she had descended to 294 metres altitude and flying
over green valleys near Abaddou, but still keeping up a
fast speed of 60 km/h.
At 2pm, she was 42
kilometres further north, flying over farming lands near
Oulad Ougal and was again gaining height to 1050 metres.
Over the next two hours she travelled 102 kilometres N
and was flying between 1793 and 1115 metres. She then
dropped down to roost about 15 kilometres SE of the city
of Khouriba, the centre of phosphate mining.
Her day's
migration, see map, was a dog leg to avoid the highest
mountains of the High Atlas, but she still covered 243
kilometres. The weather was cloudy in places and the
wind light. The forecast for 21st is cloudy with
showers, with light variable winds, temperature
12C.
She is about 370
kilometres from the Straits of Gibraltar so she might
cross there on 22nd March if the weather is good.
Fernando Gavilan emailed last night to say that it was
very rainy today at the Tarifa raptor migration watch
centre and just one osprey and some other raptors
crossed the Straits into Spain, but on 19th there were
several thousand black kites and 4 ospreys. It would be
exciting if some of the migration observers identify
Logie migrating in Spain.
|
21st March |
Logie still at roost
6am but no further signals until 11am. Weather cloudy
with showers, light west winds. Overcast might result in
solar battery not charging fully. By 11am she had
flown 82 kilometres north and was near Sidi Legchiche.
GPS signals started again at 1pm when she was a further
74 kilometres north, flying NNW at 39km/h, about 20
kilometres east of Rabat. An hour later, she was near
Sid ali el Moudene, flying NW at 26 km/h, suggesting she
was flying into the wind. At this stage she was close to
her autumn track, but by 3pm she had veered more to the
NE and was flying E near Sidi Azzouz at 60km/h at 549
metres - over the cultivated lands of northern Morocco.
At 7pm she was near Ouezzane and was 16 kilomteres from
the large reservoir lake Qued-el-Makhazine. She roosted
in wooded hills 15 kilometres east. Her day's flight was
281 kilometres.
She is now 125 kilometres from
the Straits of Gibraltar.
|
22nd March |
The weather in
northern Morocco and the Straits is cloudy, with rain
showers and a fresh to strong west wind of 50km/h.
Logie was at the tree rost from 4 to 7 am, and then at
8am, Logie was 200 metres north of the roost, flying NNE
at 66 km/h over wooded mountains between Arhtites and
Assara. An hour later she was 27 kms north, flying at 50
km/h NNW near Menorka, and at 10am she was crossing
wooded hills between Jebel Kereha and Jebel
Bohassin and flying N at 58 km/h, at 1832 metres. She
had gained a lot of height and looked determined to
cross the Straits. A report this morning from John
Cortes on Gibraltar said the wind was strong westerly.
At 11am she was over the sea just
north of Cabo Negor heading parallel to the coast
towards Ceuta; she was flying at 42km/h NNW at 56 metres
over the sea. The wind drifted her east and an hour
later she was out in sea 36 kilometres east of Gibraltar
and had travelled another 58 kilometres. She was flying
at 63 km/h to the NNE at just 17 kilometres over the
sea. This was a hard crossing of the Straits and thank
goodness there were no yellow-legged gulls to harass
her. At 1pm she had reached the Spanish coast just north
of Fuengirola and had changed heading to north and was
flying at 82 km/h and gaining height into the hills.
Later note: John
Cortes of The Gibraltar Ornithological and Natural
History Society writes" The 22nd saw relatively low
passage - as it was so windy we suspect that, like
Logie, quite a lot of birds passed well to the east of
Gibraltar. We did have about 200 Black kites, and
a variety of other species, including 5 Marsh Harriers,
7 Egyptian Vultures and some Black Storks and White
Storks - and 2 Ospreys." While Luis Barrios,
Director of Fundacion Migres, which monitors raptor and
stork migration across the Straits to Tarifa and
Cazalla, reports "a very poor day for passage - just 3
black kites, 2 short-toed eagles and an Egyptian
vulture. This compares to 1220 migrants on 20th, 321 on
21st and 173 on 23rd, mainly black kites. Single ospreys
on 20th and 23rd."
So Logie
crossed on a very poor day for raptor migration from
Africa to Europe.
At 2pm she was in the hills of
SPAIN, north of Marbella. She was over
Cerralba,just south of Pizarro flying N at 40km/h at 404
metres. By 4 pm she was flying over the waters of the
reservoir lake, Embalse de Conde de Guadlahorce. One of
three lovely lakes in the mountains about 25 kilometres
SW of Antequerra. She was probably fishing over the
lake, because at 5pm she was perched on a hillside of
olive trees on the south side of the reservoir and may
be was eating a fish. She roosted about 500 metres north
in woods above a bay inlet.
The day's migration was 281
kilometres. The weather at Marbella was light
rain, cloudy with light SW winds; temperature 47F/8C;
(the winds at Gibraltar were 50km/h). The forecast for
her location tomorrow is clear skies and sun.
It's great that she has got back
to Europe after another successful crossing of the
Sahara Desert. She has still has at least 2300
kilometres (1425 miles direct line) to go before
reaching her nest here in Moray. That's about 8 - 9 days
in good weather, but there is a very cold wet and windy
weather system over the UK and France. Here near her
nest, it's been very cold, with strong NNE winds and
frequent snow showers today.
This is the
reservoir lake of Embalse de Conde de Guadalhorce, where
she was almost certainly fishing at 4pm, and probably
eating a fish perched on hillside above the lake at 5pm,
and then her roost. |
23rd
March |
Logie was
roosting above the lake from 6am to 8am. Fernando
Gavilan knew she was at the lake last evening. He
emailed today to say " I was at the lake at 6.30 am GMT,
very near where you reported the osprey. At 7.28 am GMT
we saw a bird, possibly the osprey a long way from us
over the water. At 8.59am GMT, we saw an osprey leave
the dam area of the reservoir and fly low over the water
about 300 metres from yesterday's location, and we lost
it above the edge of a swamp. I am enclosing a few
photos." Many thanks Fernando for finding Logie
and sending photographs of the reservoir.
From our later
data, Logie departed from the site about 9.30GMT.
A fisherman's website reports that this reservoir is
very good for barbel, carp, nase and pike - a good
feeding site for ospreys.
Fernando's photos from today -
Embalse de Conde de Guadalhorce. Right photo is roosting
area
|
23rd March |
Logie at roost until
8am GMT. At 10am, she was flying north over the
Flamingo Lake at Funte de Piedro and an hour later has
crossed the Malag - Seville highway and was near
Casariche. At 12am, she was 66 kilometres to the north,
flying at 45km/h north at 699 metres near Aguilar de la
Frontera. An hour later she was 28 kilometres north,
gaining height to 1096 metres and had just passed over
Espejo, SE of Cordoba. She flew another 27 kilometres in
the next hour. At 3pm she was flying north at 56km/h
over the mountains, and passed through the hills at 4pm
near Fuencaliente. She was at 1298 metres and kept this
height going across the plains to Puertollano.
By 6pm GMT she had passed over
the Sierra Morena, and was flying NNW at 33km/h over
wooded hills about 25 kilometres south of Cuidad Real.
She had not yet stopped to roost. Her day's flight at
this time was 217 kilometres. She was flying over
areas that I know from visits to Andalusia - I wonder if
she saw an Iberian Lynx on her travels - a
beautiful animal I failed to see in the Sierra
Morena. At 1900GMT she had stopped to roost in a
wooded hill top two kilometres further north.
|
24th March |
Only one signal in
so far - she roosted on a wooded cliff above the Tajo
river, above the lake Embalse Entrepenas overnight
24th/25th March. This is remote country 5 kilometres
south of the Trillo Nuclear Power Plant. Juan Prieta
tells me it is a favourite river valley for ospreys and
cranes.
The weather forecast (today 25th)
is sunny with clouds & light N winds, but cloudy and
rainy with stronger N winds in North
Spain. |
25th March |
Logie still at roost
at 0800GMT, moved 300 metres beside river at 9am.
At 10am was 16.8 kilometres N flying NW at 31km/h at
1197metres north of Cifuentes. At 1103GMT, Logie was
migrating north 42 kilometres north of the Tajo roost;
she had just crossed the Madrid - Barcelona motorway and
was 8 kilometres SE of Siguenza. At 1300GMT she at
1195metres near Medinaceli and an hour later was flying
NNE at 56 km/h at 1584 metres SE of Soria. By 4pm eas
flying at 14km/h N near Valdeperillo and an hour later
was roosting beside a small river 25 kilometres ENE of
Logrono. Day's flight was 188
kilometres. |
26th March |
Logie was at roost
at 0400-0500GMT, at 9am she was 14 kilometres north past
Los Arcos; at 10am she was flying N at 41km/h at 933
metres. At 1200 GMT she was flying west at 21km/h over
Zumala on the coast of the Bay of Biscay. An hour later
she was perched for several hours at the bottom of the
cliffs about 3 kilometres to the SW. At 1634GMT
she was a further SW inland from Lekeitio. The day's
flight was 113 Kilometres. The weather was rain and
clouds, with 13mph west winds, which was not suitable
for setting off across the sea. The forecast for
tomorrow in heavy rain and west winds, so she may be
delayed on north coast of Spain.
Logie's
migration to Bay of Biscay on 25th 26th
March |
30th
March |
Just home
from helping to host a 3 day beaver conservation study
tour in Bavaria and neither of our rural hotels had
wireless internet connections and two other
possibilities, in our hectic (and very interesting) tour
of beaver sites, had wireless internet but did not know
their passwords - so this evening a rapid look at
Logie's position. My sincere apologies for the break in
updating Logie's webpage, and especially sorry to those
who were worried she was lost at sea.
After reaching the Bay of Biscay
coast, there has been a series of cloudy, rainy days
with westerly winds, and she has decided to wait for
better weather before heading north. Logie has been on
the coasts north and east of Bilbao in northern Spain.
Most days she has been around the estuary of the River
Mundaka which runs into the Bay of Biscay, from
Guernica. It looks a very good place for fishing
ospreys. As soon as the weather improves she should head
north and I'm pleased that I can now update regularly
the rest of her migration.
Either later this evening or
tomorrow morning I will fill out the details of her
sojourn on the Basque coast. The weather there
this evening is still rainy, with heavy showers,
overcast and light west winds. |
30th
March |
Logie
spent all of Sunday 30th March around the Mundaka
estuary. She was roosting in trees on the eastern shore
at 0400-0500GMT; then moved east in to the forest for a
couple of hours. At 0800GMT she was in mid estuary, and
then spent the rest of the day in trees at the north end
of the forest. At dusk, she was roosting in the south of
the forest, two kilometres from the estuary.
|
31st March |
Logie has spent
another day around the Mindaka estuary, which is called
the Urdaibai Biosphere Reserve. At 0400GMT she was
roosting in the hill forest north of Kanala, an hour
later closer to the estuary; then back in the hills
0600-0700. She moved a kilometre north for three hours,
then back near roost, before flying our into the
estuary, north of Isla,at 1600GMT; finally she moved SE
in to the forest again. It was rainy most of the day.
Tomorrow's forecast is similar with showers and light
west winds in northern Spain and SW France; clearer
sunny weather is forecast for Wednesday - may be she
will move on soon.
Urdaibai Biosphere
Reserve - Logie's movements on 31st March
The Urdaibai Biosphere Reserve is located in the
Euro Siberian region, on the Bay of Biscay coast, in the
north of the Iberian Peninsula. Urdaibai covers an area
of 220 km2 with around 45.000 inhabitants, the 80% of
them concentrated in the towns of Gernika and Bermeo.
The territory is characterized by a hydrographic basin
that ends creating a great salt marsh and a coastal
landscape with high sheer cliffs and capes. The craggy
inside countryside is occupied by meadow land, oak
groves, leafy woods and specially by fast-growing
conifers. The coastal landscape is covered with
cantabrian woods of holm oak and strawberry trees, along
the edges of the Mundaka estuary. In Urdaibai have been
described 615 species of vascular plants, 318 species of
vertebrates, 245 of this species are birds. Along with
the rich Basque culture, the site has a particular
interest, since it contains various remnants of the
prehistoric, roman and Middle ages. The economy leans
heavily on metallurgy, fishing/ maritime activities and
forestry, and on the exploitation of local resources
(arable and cattle farming). There is also a tourist
trade, centred mainly on the local beaches, the
historical towns (Gernika) and the natural environment.
The area is implementing a management and land use plan
and a development plan including socio-economic aspects
and promoting sustainable activities such as quality
tourism, agriculture and forestry.
Big news at home is that a male
osprey was on Logie's nest at 11.30am and was almost
certainly her mate from last year, although I did not
identify his colour ring before he flew off, almost
certainly to fish. It looked as though he had just
arrived from migration - in excellent bright plumage but
looking very empty and hungry. The male in the next nest
also arrived today. |
1st April |
Logie stayed at
Urdaibai estuary area all day - she was at her southern
roost on east side of estuary, north of Isla, until
0500GMT, and then again from 1800 to 2000GMT; no
transmissions in early morning when probably hunting;
then from 0900 to 1400GMT she was at her northern
perching area in forests north of Kanala. The weather
was wet and cloudy, so she was still waiting, but
forecast for 2nd April is clearing with sun and showers,
and rain showers ceasing in afternoon, with very light
north winds. This is for the Basque coast and the SW
French coast. So at last she might continue her
migration. Several people emailed telling me about the
area - the outer estuary is a great surfing
beach.
Today, there was a 'pair' of
ospreys on Logie's nest - the female, green ring 5B, was
from the next door nest and the male, red 7J, was a bird
I ringed as a chick about 20 miles away in 2001.
Another male was displaying with a fish over nearby
forest. |
2nd April |
Logie was at the
south roost early morning and at 12.30pm was one mile
east of the estuary. Richard Gallagher emailed to
say he looked for Logie on Monday 1st April without luck
- he has regularly seen ospreys in the estuary on spring
and autumn migration, with 5 in a day being his highest
count. He said grey mullet was the favourite food.
Later in the day, the warden of the reserve, Aitor
Galarza emailed to say he looked for Logie while on the
reserve between 1030am and 1.30pm, but did not see her.
He sent the following photograph of the estuary, that
Logie has frequented; taken at 11am.
Urdaibai Biosphere
reserve - photo by Aitor Galarza |
3rd April |
Logie was in the
usual southern roost in the early morning; but at 10am
local time was 14 kilometres to the west near Mungia. An
hour later she was back on the estuary, and in mid
afternoon was about a mile west. The weather has
improved so she should restart her migration.
Jose Mari Unamuno of the Elaia
Bird Migration Centre watched Logie fishing in the
estuary on 1st April. He said she was shy and harassed
by yellow-legged gulls, but in the end landed on the mud
and ate the fish. He sent several photographs and I
enlarged one , which is shown below, of Logie eating a
fish in the estuary at low tide.
There were no
ospreys on Logie's nest yesterday or
today. |
4th April |
At northern roost in
forests 5 to 6am local time; on shore of estuary close
by 7am to 9am; then moved to south end of estuary
in two locations to 2pm. Forecast is for sun
tomorrow so may be she will move. |
5th April |
She was in the
western side of estuary near Busturia at 7pm last
evening local time; and on the north-east shore opposite
Txatxarramendi at dawn. Weather now perfect for onward
passage - bright sun, clear skies and light or nil wind.
She has had a ten day stop-over in poor weather but
should have caught plenty of fish. Next transmissions
due this evening.
She actually stayed put - may be
she sensed how bad the weather was further north. In the
morning she was in the north roost, and during the
afternoon and evening was in woodlands at the SW side of
the estuary, inland from Mureata. |
6th April |
The signals showed
she was still at Urdaibai estuary reserve this morning.
Today in northern Scotland, there are strong north winds
with snow blizzards, and many osprey nests will be
covered in snow - there were no ospreys at Logie's nest.
Then at 6pm, I received the
following email from Aitor Galarza, warden of the
reserve, along with the enclosed photograph of Logie
eating a fish.
Hi: Great and beautiful! Logie
was eating at 12:00 on the muds of the right part of the
estuary (Kanala). She begins shouting when I approach to
her although she couldn´t see me because I was inside
the wood. I could see the transmitter and the white ring
with AN. I have taken some pictures that I send
you. When I left her, at 12:30 she continued eating. She
seems to be comfortable in our small estuary. I dream
with ospreys nesting here one day. Yours
Aitor Galarza
Aitor: Thanks very
much for the photograph and the red-hot news of
Logie.
After looking at
the photograph, she looks quite hungry to me, obviously
the migration journey has already been long and arduous;
but the heavy rains last week would have made it more
difficult to catch fish in the estuary. Richard
Gallagher mentioned the problem of murky water when
rivers run high, in his email, and we see the same in
Scotland when heavy rains turn the rivers Spey and
Findhorn brown and the fish are hidden. So she
needs to feed up now, ready for the next stretch home
once the weather improves. |
7th April |
Signal at 7am local
time showed Logie in mid estuary - presumably getting
the morning fish. Weather forecast for north Spain is
partly cloudy; then rain for tonight, Tuesday and
Wednesday, which is not good migration weather. But
Logie got through before the change in the weather ahead
of the clouds!
At 5-6am local time she was at
the south roost, then at 7am in the estuary (presumably
fishing); at 9 am she was at the north roost in the
forest. An hour later she was several kilometres NW of
the estuary flying SW at 39km/h at 450 metres,
presumably gaining height. Because an hour later she was
24 kilometres SE near Madalena and at midday was
skirting the western slopes of the Pyrenees, flying at
35 k,m/h at 634 metres near Altzola. An hour later she
had flown into FRANCE, and was flying NE at 58 km/h near
Monte Aldura.
By now she had cut the corner and
was turning northwards; at 3pm she was near Saint
Jean-de-Luz flying NNE at 33km/h and had levelled out at
an altitude of 52metres following the coast. She was 22
kilometres further on an hour later inland of Penon. At
5pm local time she was flying NNE at 33km/h near
Vielle-Saint-Girons and the last signal at 6pm was at
Mimizan, when she was flying N at 40 km/h at 123 metres
altitude. She still had at least an hours flight before
dusk.
After 11 days at Urdaibai, her
day's flight was at least 196 kilometres and she made a
perfect circuit of the Bay of Biscay coast, with no
attempt to fly across the sea. The weather in Spain was
getting cloudier with rain in the Pyrenees, while ahead
of her France was in clear skies. Now to see how quickly
she gets back home. Still dreadful cold snowy weather in
Scotland and an afternoon check of six local nests found
no ospreys.
|
8th April |
On the evening of
7th April, Logie moved another 4.5 kilometres north to
roost beside a forest track in a coastal pine
plantation. Next morning, she was at the roost at 5am
and 6 am local time. At 7am she was between
Biscarrose-Plage and Lac de Cazaux, flying north at 38
km/h at 76 metres altitude.
The next signal was at 11am and
she 55 kilometres further north and had passed Cap
Ferret, and was flying north at 53km/h into a light NE
wind. An hour later she was perched at the south end of
a coastal freshwater lagoon called Etang de Carcaus, and
at 1pm was flying at 36km/h NNE at the top end of the
lake. An hour later she was perched overlooking coastal
dunes, and then she was north of Montalivet-les-Bains,
before heading north over the sea between Cordonan
Lighthouse and the mouth of the river
Gironde.
She reached the north shore at
4pm and turned NW to follow the coast north. At 5pm she
was perched in a coast forest plantation, and an hour
later had moved a further 1.5 kilometres north to a
night roost in a conifer plantation beside a track about
one kilometre from the sea. She was on the peninsula
west of Tremblade, and south of Ile d'Oleron. During the
day she had flown 170 kilometres north in poor
conditions with a light to fresh NE wind - poor
conditions for migration.
|
9th April |
She was still at her
roost at 5am local time - the last signal of this batch
of transmissions. Weather for today is again poor, with
rain showers and fresh north to north-east winds; fairer
conditions in Brittany. Another difficult day for
migrating.
Last evening, after the rain
cleared for a while, we checked Logie's nest and found
the new male red/white 7J eating a big fish on a branch
above the nest. The nest showed signs of building so he
seems to be in occupation, because Logie's mate has also
not yet returned to Scotland. This male was first seen
at this nest on 1st April, with a female green/white 5B
but she is now at her last year's nest with her regular
mate. So another osprey season starts - but rather
slowly in the cold wet snowy weather.
Logie's migration
route through Spain and France to 8th
April |
9th April |
A difficult day's
migration in poor weather conditions. Rain,
north-easterly winds and poor visibility on the French
coast. Logie was at her roost until 8am local time, and
an hour later was perched close to the shore at the
north end of the peninsula. At 10am she was on Ile
d'Oleron flying west at 51km/h just 24 metres along the
shore. At 11am she was perched beside fish farms west of
La Bree-la-Bains. At midday Logie was flying N at 30km/h
at 17 metres over the sea. At 1pm she was perched on the
shore of Ile d'Re and then moved up the island to the
north end. At 4 - 5pm local time she was perched near
fish ponds, and then roosted overnight in scrubby
woodland close to the coast. Her day's journey was 42
kilometres.
|
10th April |
Logie still at roost
at dawn on last signals of this batch. Today's forecast
is again poor for the French coast, with light rain,
partly cloudy and early morning fog at her location;
heavy rain to the south and better conditions to the
north in Brittany. These are hard conditions for
migrating birds, whether ospreys or swallows, returning
to northern Europe.
A signal at midday local time
gave a position 2 kilometres east of the island
suggesting Logie was migrating to the mainland coast.
The weather has improved in France and several contacts
reported by email that she should find better
conditions into Brittany.
Here in Scotland, Logie's mate
from last year, colour ring black 6R, arrived at their
eyrie today. At 7pm I found him on the old nest,
presumably after getting rid of the intruding male - red
7J. BUT there was a female beside him
soliciting for food - and after watching for fifteen
minutes I could see that it was an old female with just
a metal ring on the right leg. This appears to be the
old female, from another local eyrie, which lost its
long time mate in the winter 2006/2007. She is
definitely over 15 years old, and possibly an ancient
bird approaching 30 years of age. It would be really
interesting to know her ring number, because she lost
her colour ring a long time ago. 6R was too busy
renovating the nest to bother about fish. It's about
time Logie got home!
|
11th April |
Big worries this
morning as no signals came in before I had go out. But
good news when I got back - Logie was flying north in
the afternoon.
She stayed on Ile de Re all day
yesterday, visiting several parts of the island before
roosting for the night about 1 kilometre SW of the
previous evening's night time roost. This was just north
of the shellfish farms. Viv Leigh emailed in to say the
weather wasn't too bad though cold 9C; and that the fish
pens are mainly for oysters and mussels. I was worried
she might have got into trouble in a fish farm, but she
would not bother shellfish!
She left the island just before
10am local time, when she was flying NE towards the
mainland at 54km/h, just 26 metres above the waves. The
wind being fresh westerly. An hour later she was
perched on oyster poles on the low tide shore at
Sainte-Anne. At midday Logie was 15 kilometres north,
flying NW over Revroc at 41km/h and had gained height to
305 metres. At 1pm local time, she was 23 kilometres
nearer home, flying due north at 65 km/h and was at an
altitude of a thousand feet. Another correspondent,
Elaine Clark , emailed to say it was a fine sunny
morning but had turned windier with some hail showers.
At this stage, Logie was 330 kilometres south of the tip
of the Cherbourg Peninsula.
At 2pm, she was 35 kms NNE flying
north at 69km/h; an hour later she was near Beaupreau,
flying NNW at 37km/h at 590 metres altitude. Just before
4pm she passed low over the river Loire near Saint
Florent-le-Vieil. She reached her roost before 6pm and
had flown 211 kilometres during the day. She roosted in
a line of trees in farm land just 2 kilometres SE of
Segre.
|
12th April |
Logie was still at
her roost at 6am local time. An hour later she was 7
kilometres north, flying NNW at 35 km/h, and at 8am she
was perched in a large field in open ground 14
kilometres to the north - there were small ponds in the
area so she may have been eating a fish. At 9am she was
flying NNW at 36 km/h near Laval, and an hour later
flying NNE at 58km/h heading for
Lassay-les-Chateaux.
I received an email at this time
from Steve Nuttall, with a photo of Logie's roost area
on Ile de Re; he said it was a glum cool day with rain
forecast in La Mayenne. He had seen an osprey once near
his home - at a lake at Fontaine-Daniel - Logie passed 6
kilometres to the east of this lake at
9.45am.
She was near Sainte
Andre-de-Massei at 11am flying NNW at 62km/h; and an
hour later near Campandre-Valcongrain circling over a
ridge of hills. At 1pm, Logie was 3 kilometres south of
Bayeux flying NE at 84 km/h at 108 metres
altitude. She cossed the French coast just east of
Port-en-Besin on the Normandy coast and at 2pm (3pmBST)
she was kilometres over the English Channel flying N at
61 km/h at 930 metres (again she crossed a coast at high
altitude - to avoid gulls?). An hour later she was 66
kilometres further on in mid Channel flying NNE at 52
km/h just above the waves. At 5pm, she was 62 kilometres
further on and was flying at 75 km/h just 13 metres
above the water. The SW winds were pushing her on but
also drifting her north-eastwards.
Logie finally arrived in ENGLAND
at 5.45pm, arriving just about over Brighton west pier,
at 6pm she was flying N at 40km/h above Keymer, south of
Burgess Hill. At 7pm Logie arrived at Ardingly
reservoir, and at 8 pm was perched in trees on the west
side of the North Arm of the reservoir. Her day's flight
was 360 kilometres. The weather had been grey and
partly cloudy, 10 kilometres visibility and fresh SW
winds of 24km/h. She had done well to cover such a
distance in gloomy conditions and the wind had drifted
her east of her northwards track.
David Plunton saw two ospreys
near Winchester at 10.15 am today and Nick Bond posted a
sighting of an osprey over Littlehampton, so it appears
other ospreys were crossing the channel.
Logie now has 780 kilometres to
fly to reach her nest and it appears she will travel up
the eastern side of the country. With luck she'll reach
home on Monday - but it's fresh north winds, rain and
snow showers up here - but at least the intruding female
was not at her nest today.
Logie's track
across France and the English Channel 12th
April |
13th April |
Logie roosted
overnight on Ardingly Reservoir north of Haywards Heath
in Sussex, this was 16 kilometres further north. She was
in the nature reserve section, where ospreys are
sometimes seen on migration. The map shows her position
in the lake - hope bird-watchers there see her fishing
this morning before she heads north.
It looks reasonable weather for
migration, light winds, some rain showers, but gloomier
in the north. If she leaves after fishing she might
reach Yorkshire by dusk, passing west of London, and
near Rutland water about 1pm. |
13th April |
Just been to her
nest; and all is ready there. Her mate 6R (from the
black colour ring 6R on his left leg) was perched in
the dead pine above their nest eating the final
tail bit of a small trout at 0837am. A lovely
quiet morning, a nip in the air, early morning gloom
starting to clear to blue patches. A mistle thrush
singing loudly near the eyrie and pheasants calling
below. No sign of the intruder females.
Logie's mate - Black
6R - eating a fish above nest at 0837am
There will be no
more updates of Logie's position until late evening
transmissions from the satellite
My monitoring of
osprey nests today found 10 adults back at 11 nests so
it is a slow start to nesting. |
13th April |
She was still at
Ardingly Reservoir at 9am. An hour later she was flying
at 52km/h NW at 622 metres altitude just south of the
M25 motorway, north of Leatherhead. She turned NW and at
11am was perched on the SW side of the Queen Mary
reservoir near Staines. She was still there at midday
although slightly different place so she may have
fished. Then she flew one kilometre west to perch in
trees on farmland near Laleham at 1pm and 2pm. She then
flew 5 kilometres west, passing over the M25 again just
north of Junction 12 to perch in big trees on edge of
field close to the main rail line, north of Virgina
Water. She stayed here from 3pm to 5pm, and then moved
600 metres to roost in big trees in the main wood. She
was still there at 9pm.
The weather yesterday was
variable, rain showers, cloudy at times, which may be
why she did not head north. Further north there was more
rain, and even snow in Scotland.
Logie's travels
around Staines and roost near Virginia
Water |
14th April |
Today's forecast
gives early morning fog clearing to partly cloudy with
sunny spells and rain showers, getting less sunny
further north, with fresh cold NW winds. Hopefully,
Logie will head north but it's difficult to predict how
far she will travel. At least one female osprey called
by at Rutland Water yesterday, and she may pass that way
today. May be someone will sight or photograph
Logie on her way north. Thanks to those who looked
yesterday.
An email just in this morning
from Sue Halket, explains Logie's delay yesterday. "I am
not surprised that Logie didn't fly far yesterday. We
had horrible conditions with thunder, lightening and
hail storms. I wondered during the day if she would fly
in such conditions and vaguely looked for her
flying through as we are to the west of Heathrow".
Logie was still at her roost at 8
am and then, at 9 am, was perched on the south bank of
Virginia Water, presumably fishing. At 10 am, she was
flying NNW at 32 km/h, north of Englefield Green and at
11 am, she was as below!
Oops! A GPS position at
11am gave Logie's position as flying NW at 22km/h at 500
feet over Terminal 4 at Heathrow airport - hope she got
clearance to cross the runways safely! She must have
been fishing in the reservoirs to the south and is now
heading north.
Google picture of
Logie's position at 11am - remember Google pictures are
not today's images so this may not be exactly what she
saw as she headed across the airport!
At midday, she was flying WNW
over the northern outskirts of Maidenhead, and then
crossed the River Thames at Henley-on-Thames. At
1pm, she was flying SW over Sonning Common, at 439 m
altitude. An hour later, she was perched on a wooded
island beside the Thames, just below the road bridge
between Goring and Streetley. At 3pm, she was
flying SE near Lower Basildon, and then at 4pm was
flying back NW, back and forth along the river. At
5pm, she was perched in woods besides the Thames, south
of Goring, and an hour later had flown south, perched,
again by the river, near Beale Park. She roosted
overnight in woods on the eastern side of the river.
|
15th April |
Logie spent last
night beside the Thames north of Pangbourne; she
was still at the roost at 4am, but by 5am was downriver,
just NW of Whitchurch-on-Thames, and spent the next few
hours around the river, up until 9am.
At 10am, she was on her migration
once more, and was flying west at 33 km/h, near West
Hagbourne, before passing over Didcot power
station. At 11am, she was flying west near
Eynsham, and then went over Chipping Norton to be near
Little Rollright at midday, when she was circling at 245
m. She then turned west, and at 1pm was perched in
a field just south of Barton-on-the-Heath. At 2pm,
she was flying west at 62 km/h, east of Evesham, and had
climbed to 1334 m altitude. With rain showers
during the day, she was probably finding the flight
difficult, and at 3pm, was perched in a wood beside the
A441, north of Redditch, a little south-east of Rowley
Green. Awaiting further signals! The
forecast at the moment for the Midlands is rain showers
with south-easterly winds. During the last two
days, Logie has covered a distance of 188
kms.
Latest news: see
below.
Logie's
journey on 14th and 15th April
7.30pm Logie is still at the wood
near Rowley Green, south of Junction 2 on the ring road
below Birmingham. I telephoned a friend in Birmigham and
he told me it was pouring with rain at 7pm so I can
understand why she has stayed put. The forecast for
tomorrow is better. The nearest places for Logie to fish
early tomorrow are the Bittell reservoirs, 2 miles
NNW, or possibly Earlswood Lakes 5 miles ENE. Hope
she is seen on her way north tomorrow.
Logie's roost site
evening 15th April
|
15th April
|
Logie's progress
over the last few days has been slow, almost certainly
due to poor weather conditions. It is interesting that
she has moved to the north west, where she will pick up
the direct line from Cherbourg back to Scotland.
It's interesting that , having been blown eastwards by
bad weather in France and the English Channel, she did
not redirect from Sussex straight up the east side of
England, but went back to what was probably her planned
track. The map below shows her probable flight
line if she had not been drifted east via Brighton.
|
16th April |
This morning, Edwood
Walker emailed to say he had looked for Logie:
"I went up there for a look
around this morning between 6.15 and 8.00. If the fix
from yesterday was correct she was on a ridge in a patch
of oak bluebell wood which belongs to the Methodist
Church. The Weather got progressively foggier the longer
I was there and I didn't see her, if indeed she was
still there. Still damp, overcast and misty here
(10.45am) but visibility is gradually improving".
The first data came in at 5pm and
showed that Logie did indeed move position late last
evening and roosted beside a small lake with trees about
a kilometre SW of the last position. At 11am she was
perched at the south end of Lower Bittell reservoir, and
then spent the afternoon on farmland and trees about a
kilometre to the SW, between the railway line and the
motorway.
Just after I got this data, an
exciting email came in from Mary & Jack Lindsey,
with news that they had seen and photographed her at
Bittell reservoir in the morning:
"Thanks to your itinerary, we
were able to take a chance and get to Lower Bittell
reservoir at 7.30 this morning - just in case! We didn't
expect much to happen as it was even foggier there than
at home. Our delight was worth everything when, at
10.25ish Logie appeared!!!!!! We only saw her
intermittently for about 10 minutes, then presumed she
had either caught something or moved out of sight, so we
left to get warm!
Have attached a couple of pics
Jack took. She was a long way off, and it was very poor
photo weather! At least the aerial is visible in one.
After all her trials, the gulls wouldn't leave her
alone. I took a bit of (very amateur!) film, but it's
too long to e-mail, I'm afraid. It was marvellous to see
the bird we've been following for so long". Their two
photos are shown below.
Thanks to Jack
& Mary for the great photos - being mobbed by
gull on right
A signal at 6pm showed that Logie
had moved south, to the west of Alvechurch. After fog in
the morning; the weather is partly cloudy with a 9mph NE
wind. Hopefully, she'll fish in the morning then head
north! |
17th April |
At 5am Logie was
roosting in a wood beside the M42 north of Alvechurch.
Weather this morning near Birmingham is clear. Still
there at 6am, then just NW of lower Bittell reservoir at
7am. This was confirmed by Rob who saw Logie fly over
Lower Bittell reservoir at 6.10am but she did not fish
there; then at 8.20am he saw her perched in at tree to
the NW, so she may have fished at the other lake, then
at 8.30am she flew off north in clear weather. Craig
Round saw her circling the Clent Hills ten minutes later
being mobbed by crows, and she then went off NNW
avoiding Birmingham. A fresh east wind. How far will she
go today?
At 9am, she was 17 kilometres NW
of Bittell reservoirs flying WNW at 59km/h between
Stourton and Wollaston; an hour later she was 31
kilometres further NW flying at 74km/h WNW at 519 metres
just NW of Iron bridge, near Telford. She passed
Shrewsbury and at11am was 41 kilometres further NW
flying at 48 kms/h about 5 kilometre NW of Oswestry. By
midday Logie had passed into North Wales and was now
flying north at 51km/h at 270 metres two kilometres SW
of Mold in Flintshire. She was flying strongly to the NW
through the morning with a fresh east wind, up to
30km/h.
At 1pm Logie was flying over the
centre of the Dee estuary at 638 metres above sea level,
flying N at 85km/h about 2.5 kilometre from Caldy.
She then flew up over Liverpool Bay, being 17 kilometres
west of Southport at 2pm, flying strongly N at sea
level; and hour later still at sea level she was flying
at 39km/h N 7.5 kilometres SW of Walney Island. She then
came ashore and at 4pm was flying N at 35km/h near
Hallthwaites in the southern Lake District. She now
turned NE and an hour later had flown a further 21
kilometres and was just S of Little Langdale flying SSE
at 57km/h. At 6pm Logie was perched beside a small river
and pools east of Skellwith Bridge just south of the
road to Ambleside. Then she flew 6 kilometres SE to
perch on the west shore of Lake Windermere. An hour
later she was 400 metres further south along the shore
where she roosted, due west of Hawkshead.
Her day's flight was 280
kilometres, the first part coping with a strong easterly
wind, may be it was the wind which drifted her NW or she
may have wanted to pick up the track of her autumn
flight over the sea to the Lake District. No more data
until tonight.
Logie's
flight 17th April |
18th April |
Logie was was still
at her Windermere roost at 6am, but by 7 am she was 16
kilometres to the NW, suggesting she started her
migration at 6.30am. She was one kilometre SW of the
south end of Thirlmere, flying NW at 66km/h over the
Lakeland hills at 653 metres altitude. She left the
Cumbrian coast, just north of Maryport, and at 8am was 8
kilometres out in the Solway Firth, flying NW at 42km/h
towards the Dumfries-shire coast 20 metres above the
sea. She carried on across the Firth, being drifted west
and landed on the southern shore where she rested for an
hour. At 2pm and 3pm she was at her autumn fishing site
at Loch Kinder (see last autumn's first stop-over). She
spent the night in woods to the NW, not far from where
she spent 5 weeks on a stop-over last August. But she
does not have time to stop this time! 190 miles to
home.
Just in case she flew extremely
fast northwards I checked her nest at 5pm, when her mate
was eating a fish and an intruder female was sitting in
a tree near the nest. But no sign of Logie. We returned
at 8pm and stayed until dusk, still the intruder female
was near the nest and landed on it on one occasion.
Logie's mate flew off to roost on a dead tree some
distance away at 8.50pm, and the intruder roosted near
the nest tree. Logie will have to oust this female as
soon as she arrives home.
Intruder female at
Logie's nest
Long distance
digi-pic using Nikon Coolpix and Swarowski
scope
|
19th April |
Logie spent the day
up until at least 5pm in the same area - it was thick
cloud, with drizzle and a north-east wind and this
prevented her moving on north.
Logie's movements on
18th and 19th April |
20th April |
Logie spent another
day SW of Dumfries - mainly perched in woodlands, which
she used on her southward migration. In the early
morning she was fishing at Lochaber Loch near
Lochanhead. The weather was better than yesterday but
still overcast with a fresh NE wind. Larry Griffin of
the Wildfowl and Wetlands Trust told me that two
ospreys arrived on the other side of the estuary, one at
Caerlaverock WWT reserve and the other feeding on a dead
tree out on the mudflats. He wondered if the one out on
the mudflats might have been Logie, but her signals all
came from the west side of the estuary.
Fascinating that Caerlaverock and the Nith Estuary is
home to another species, Barnacle Geese, which is also
being tracked by 'World on the Move' and the WWT.
Up in Moray, it was a sunny day
but with a cold easterly wind; the male and the ringed
female were at the nesting site, although the intruder
female was mainly perched on a high tree rather than the
nest. Attempted matings were taking place but they are
still not acting like a settled pair. Not far away is
another nest which at present only has a single male, so
when Logie gets home, the intruder female could move
there, or may oust Logie if she doesn't arrive soon.
Logie could then move there to find a new mate.
|
21st April |
Still near Dumfries
- perched around Lochaber Loch midday to 4pm, otherwise
in woods nearby - wind still fresh to strong
NE. |
22ndApril |
Logie was still at
her roost near Dumfries at 5am - last signal of that
transmission. Today the weather is improving,
Scandinavian high pressure giving a better day, clearer
after early morning fog, and, importantly, winds
becoming SE rather than NE or E. Today looks like giving
Logie a better chance to fly on north - with following
or light winds she could just about make the whole
flight to her nest in a day, but we'll see. Today is the
42nd day of her mammoth migration - much delayed by
running into bad weather, like other ospreys which have
arrived over the last couple of days or are still to
arrive. So much is down to chance, if she had started a
few days earlier from her island in West Africa she
could have missed the weather delays. She had not
arrived by 9pm and I will have to wait for overnight
signals to see if she moved north part of the
way.
Actually data came in this
morning to show that Logie had left after midday as the
weather improved at last and the wind turned to
south-east. At 1pm she was NW of Dumfries, heading for
Fourmerkland Tower, flying north at 68km/h. An hour
later she was 38 kilometres further on near Leadhills
flying N at 85km/h at 1211 metres altitude, and at 3pm
she was just east of Airdrie flying NNW at 55km/h. At
4pm she was flying north at 30km/h just west of Airdrie
and an hour later was circling and gaining height just
west of Comrie, in Perthshire. At 6pm to 8pm she was
perched by the river Tay, two kilometres downstream from
Loch Tay. An hour later she was roosting 5 kilometres
away just 400 metres NW of Castle Menzies, near
Aberfeldy. She had covered 186 kilometres.
|
23rd April |
Logie was still at
her overnight roost at 5am but an hour later was
circling over the Pass of Killiecrankie in Perthshire,
which is 14 kilometres from her roost. At 7am she was
over the central Cairngorms, flying downwind N at
100km/h over Beinn Chaorainn just SE of Cairngorm, at an
altitude of 1484 metres. At 8am she was flying at
85km/h downwind across the Moray moors heading for her
nest.
Once the signals came in early
this morning, we rushed to Logie's nest and found four
ospreys circling and skirmishing over the site - she had
arrived just as we did. After checking the birds with my
binoculars, I suddenly saw the distinctive short radio
aerial and identified Logie positively - here she was
back home after her epic journey - to the exact tree she
left on 4th August last year.
Logie's flight
22nd -23rd April
There then followed a period of
continual skirmishing - Logie, the 'new' female and the
male tried landing on the nest - and sometimes talons
flashed between the two females. Logie looked fit
(although her plumage was quite faded from the glare of
the African sun) - just as well, because there was no
way the male was going to feed her in this excitement.
Sometimes even a third female joined in at aerial
circling - often all three birds would drift away high
in the sky and then return. Logie did show real
ownership several times when she landed in the nest,
crouching down with spread wings and trying to frighten
off the intruder female, but once or twice even her mate
dive-bombed her and sent her packing. Other than the
fighting ospreys, it was a lovely calm morning and three
sand martins flew by - a sign of spring at last. We
watched the excitement until 10 am and then had to
leave. I will be back during the day and it may take
several days to sort out the hierarchy at the nest -
will Logie regain her nest and mate, or will she have to
find new ones? More news late this evening and
tomorrow. On the way home, we called in at Logie primary
school, who have been following her travels and from
where Logie gets her name, to tell the children of her
safe return.
This evening Logie was perched on
the nest, the male on a perch in the next door tree -
otherwise all quiet as the sun went down at 9pm - will
check nest site to see if Logie is in control of her old
nest and do a complete update in the morning.
Later the signals came in and
showed that Logie was in continuous flight all morning
until at least midday - usually within 600 metres of her
nest. Finally at 1pm the signals showed she was perched
on her nest, and this was also the situation at 2pm, 3pm
and 4pm, so she had won back her nest. But what an extra
effort after flying back all that way; it shows the
advantages for adults to be back early. Now she needs to
build up condition to lay eggs, and at 9pm she looked
well fed (her crop was full), so her mate must have
caught an evening fish.
|
23rd April |
Photographs taken at
Logie's nest site on 23rd April
top left - first
view of Logie at 08.10am top
right - first landing on eyrie
middle left - two
females aerial
chasing middle
right - male displaying
bottom left - Logie
attacking other female at
nest bottom
right - Logie on nest mid afternoon
|
24th April |
At 8.25am, Logie was
standing firmly in her nest, scanning the skies for her
mate. His job is to catch fish and bring them to the
nest; her task is to protect the nest and, once she has
laid eggs in a week or so, to carry out the bulk of
incubation, while the male catches fish. It will take
another day or two to be certain all is normal. The
intruder female has been seen off but she has spent a
week hoping to claim this nest and mate, and now she has
to go off and find a new place - a metal ring (and no
colour ring) suggests to me she is an older osprey who
may have lost a mate, or who may have been waiting for
her mate to return. Hopefully the latter, as yesterday
saw more ospreys arriving in Scotland in what is a very
late spring arrival. If I find her nesting, I will
include that news in this log.
Now that Logie is home, I will
update this page occasionally with key happenings - when
she lays eggs, when her eggs hatch, how many young there
are, etc etc - and then in mid August, assuming
everything goes as planned in osprey lives, we will
follow her migration back to Africa on a daily basis -
she will probably leave later than last year because of
her delay, but will she stop over in the Solway?
Will she follow the same route back as she did last
year? What pitfalls will she encounter on the way back,
and will she winter on the same island? We may
even try to follow her by land and air on that journey
back!! but either way, we'll definitely
follow her progress here.
Her migration from West Africa
lasted 43 days and she flew at least 3619 miles (5803
kilometres) in 27 days of active migration; she also
spent 16 days waiting out the bad weather. Her best
day's flight was 215 miles, and her shortest just 26
miles.
We have been amazed by the
incredible interest in Logie and her migration via this
Highland Foundation for Wildlife website, the BBC World
on the Move programme and the media in general. We
have really enjoyed reading the incoming emails and been
very moved by some of the stories you have submitted -
we've also been grateful to those people who have sent
in sightings, information and sometimes photographs all
the way from the Straits of Gibraltar to Scotland.
Thanks so much for the emails - we have tried to answer
them all and still have some to catch up on.
Logie's story has been so
interesting, and incorporates so many aspects of
ospreys' lives and migrations to and from West Africa,
that following her return to Africa next autumn, we are
planning to publish a book on Logie. It will also
include comments, stories and information sent in from
observers and followers of Logie. If anyone has any
special comments or feelings about her and her
migration, please email me. We would love to
share your thoughts on this bird.
Finally, a very big thanks is due
to Talisman Energy Ltd in Aberdeen for their funding of
the GPS transmitters (and the good news is that we will
have new transmitters on several more Moray ospreys this
autumn); also to Logie Primary School, to the local
landowners who have helped with the project and to the
BBC Natural History Unit in Bristol for including Logie
in the World on the Move series, which continues right
into next autumn's migration. And a big thanks for the
GoogleEarth programme which allows us to illustrate bird
migration in such a graphic manner,
Donations to this project.
Thanks very much to those who have sent in donations to
help our osprey tracking project - if you have enjoyed
Logie's migration and would like to help fund this
project and further studies, we would be very grateful
for any donations to help with the costs of
transmissions from the satellite tracking stations,
associated osprey fieldwork and maintaining the
website. We are also looking for additional larger
funders for satellite radio equipment. To all
those who asked, we're sorry that we don't have
facilities for credit or debt card donations, but see
our donations webpage for how you can help.
Donations
|
24th April |
Several people have
asked if there are hides or facilities to view Logie at
her nest - I'm sorry, but there are none. The great bulk
of the ospreys in Scotland breed quietly at nests on
private land, farms and crofts, or in private or
national forests, where local people keep an eye on
their protection and maintain the confidentiality of the
nests to prevent nest robberies or disturbance.
This allows the ospreys to breed successfully in peace.
There are now an exciting range of visitor centres for
watching ospreys and viewing close up video of their
nests, including the long famous Loch Garten site in
Strathspey, Rothiemurchus fishery near Aviemore, the SWT
reserve at Loch of the Lowes, Dunkeld, sites in England
at Rutland Water and Bassenthwaite Lake, also near
Portmadog in North Wales, and sites at Forestry
Commission forests near Peebles, Aberfoyle and
Huntly. So there are plenty of locations to view
ospreys and learn about their lives, and even more
places where ospreys can be watched fishing. And if you
happen to find a nest, click on Reporting Osprey Nest
Sites
NEW OSPREY BOOK
DUE OUT EARLY August. Roy Dennis has written a new book on
Ospreys - called 'A Life of Ospreys' which
is being published by Whittles Publishing, Caithness.
It's a comprehensive study of the lives of ospreys and
osprey watchers, of their history (recent and ancient),
their ecology, migrations, reintroductions and wintering
of ospreys in the British Isles and abroad, with many
photographs, illustrations, maps, line drawings and
scientific data. Full details will appear as publication
approaches - it will be available countrywide but
specially signed individual copies will be available for
purchase from Roy Dennis - email roydennis@aol.com if you would like notice of when they will
be available and would like to order an inscribed
copy.
|
29th April |
Logie has been
within 400 metres of her nest ever since she pushed out
the other female; all seems settled, there has been more
nest building and today at 8.30 am Logie was standing in
the nest, and at 10.45am, she was eating a trout
on a perch near the nest; the male was standing in the
nest with a full crop (he would have eaten the front
half of the fish). Later, she flew to nest with tail end
which the male took to a branch to eat, and Logie
perched beside him. She needs to feed up in order to
produce her clutch of eggs. |
Logie's flight
details during her spring migration
Her autumn flight
was 5667 kilometres (3542 miles).
The shortest
distance between her nest and Ilha Roxa is 5198 kms (3229
miles)
Date |
Day's
flying |
Distance kilometres |
Total
Distance (Kms) |
Place |
Distance miles |
Total Distance
(miles) |
12th March |
1 |
221 |
221 |
Senegal |
138 |
138 |
13th March |
2 |
218 |
439 |
Senegal |
136 |
274 |
14th March |
3 |
313 |
753 |
Mauritania |
196 |
470 |
15th March |
4 |
339 |
1091 |
Mauritania |
212 |
682 |
16th March |
5 |
258 |
1349 |
Mauritania |
161 |
843 |
17th March |
6 |
304 |
1653 |
Mauritania |
190 |
1033 |
18th March |
7 |
344 |
1997 |
Algeria |
215 |
1248 |
19th March |
8 |
308 |
2305 |
Morocco |
193 |
1441 |
20th March |
9 |
243 |
2548 |
Morocco |
152 |
1593 |
21st March |
10 |
282 |
2830 |
Morocco |
176 |
1769 |
22nd March |
11 |
281 |
3111 |
Spain |
176 |
1945 |
23rd March |
12 |
224 |
3335 |
Spain |
140 |
2085 |
24th March |
13 |
239 |
3574 |
Spain |
148 |
2233 |
25th March |
14 |
188 |
3762 |
Spain |
117 |
2350 |
26th March |
15 |
113 |
3875 |
Spain |
71 |
2421 |
stop -over |
16-26 |
local flights |
|
Spain |
|
|
7th April |
27 |
201 |
4076 |
France |
125 |
2546 |
8th April |
28 |
170 |
4246 |
France |
106 |
2652 |
9th April |
29 |
42 |
4288 |
France |
26 |
2678 |
10th April |
30 |
0 |
4288 |
France |
0 |
2678 |
11th April |
31 |
211 |
4499 |
France |
132 |
2810 |
12th April |
32 |
376 |
4875 |
England |
230 |
3040 |
13th April |
33 |
55 |
4930 |
England |
34 |
3074 |
14th April |
34 |
with 15th |
- |
England |
- |
- |
15th April |
35 |
188 |
5118 |
England |
118 |
3191 |
16th April |
36 |
local |
- |
England |
- |
- |
17th April |
37 |
280 |
5398 |
England |
175 |
3366 |
18th April |
38 |
95 |
5493 |
Scotland |
59 |
3425 |
19th-21st |
39-41 |
stop-over |
|
Scotland |
|
|
22nd April |
42 |
186 |
5679 |
Scotland |
116 |
3541 |
23rd April |
43 |
124 |
5803 |
HOME |
78 |
3619 |
|