Observers: Marina Alexeyenko (Krasnoshtanova) (Pribaikal'ski National Park), Alexandr Povarintsev & Igor Fefelov (Irkutsk State University)
Observation site: Kultuk (Irkutsk Region, south-west margin of Lake Baikal, 51 44 N, 103 43 E)
Terms: 25 August - 17 October 2011
|
Species |
Total No. |
% |
|
Pandion haliaetus |
3 |
0.02 |
|
Pernis ptilorhyncus orientalis |
1,640 |
11.5 |
|
Buteo buteo |
9,937 |
69.5 |
|
Buteo lagopus |
9 |
0.06 |
|
Buteo hemilasius |
7 |
0.05 |
|
Milvus migrans |
1,616 |
11.3 |
|
Accipiter gentilis |
347 |
2.4 |
|
Accipiter nisus |
563 |
3.9 |
|
Accipiter gularis sibiricus |
2 |
0.01 |
|
Circus (aeruginosus) spilonotus |
5 |
0.03 |
|
Circus cyaneus |
10 |
0.07 |
|
Aquila heliaca |
17 |
0.12 |
|
Aquila chrysaetos |
14 |
0.10 |
|
Aquila clanga |
14 |
0.10 |
|
Aquila nipalensis |
5 |
0.03 |
|
Hieraaetus pennatus |
22 |
0.15 |
|
Haliaetus albicilla |
2 |
0.01 |
|
Falco tinnunculus |
3 |
0.02 |
|
Falco subbuteo |
11 |
0.08 |
|
Falco columbarius |
1 |
0.01 |
|
Falco peregrinus |
7 |
0.05 |
|
Falco cherrug |
3 |
0.02 |
|
Falco gyrfalco |
1 |
0.01 |
|
Unid. eagle |
1 |
0.01 |
|
Unid. falcon |
4 |
0.03 |
|
Unid. raptor |
25 |
0.17 |
|
Buteo buteo or Pernis ptilorhyncus |
25 |
0.17 |
|
Total: |
14,294 |
100 |
Comments:
This season was the first one since 2003 when we can to carry out daily counts during the whole migratory season.
The weather was generally good and warm. Only the strong winds and cooling fell at several days in middle September (c. 12-14 Sep).
The most interested features of autumn migration 2011 were the following:
the two early autumn peaks of migration were relatively weak, but the major peak, which was observed since 18 until 22 Sep, was very much powerful and contained the maximal daily value for all the previous counts on 21 Sep, when 16 % of the total autumn value were counted (more than 2,200 raptors including more than 2,000 Common Buzzards); there were no more significant peaks after it;
total No. of Common Buzzards did also the most record for all previous counts, containing almost 10 thousand birds per season;
in the same time, numbers of hawks and all eagle species per autumn were c. twice less than in early 2000s;
numbers of other species in 2011 were not significantly different from ones in that period.