The site was identified as internationally important for bird conservation in 2002 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.
Species |
Red List |
Season (year/s of estimate) |
Size |
IBA criteria |
Whooper Swan Cygnus cygnus |
LC |
winter (1995) |
870 birds |
A4i, B1i, B3, C2, C6 |
Tundra Swan Cygnus columbianus |
LC |
passage (1995) |
600 birds |
A4i, B1i, C2 |
Bean Goose Anser fabalis |
LC |
winter (1995) |
10,000 birds |
A4i, B1i, C3 |
Greater White-fronted Goose Anser albifrons |
LC |
passage (1995) |
15,000 birds |
A4i, B1i, C3 |
Ferruginous Duck Aythya nyroca |
NT |
breeding (1995) |
2 pairs |
C6 |
Northern Shoveler Spatula clypeata |
LC |
passage (1997) |
2,000 birds |
B1i, C3 |
Corncrake Crex crex |
LC |
breeding (1997) |
2–6 pairs |
C6 |
Little Crake Zapornia parva |
LC |
breeding (2001) |
1 pairs |
C6 |
Common Crane Grus grus |
LC |
passage (1995) |
5,000 birds |
A4i, B1i, C2, C6 |
White Stork Ciconia ciconia |
LC |
breeding (1995) |
20–25 pairs |
C6 |
Eurasian Bittern Botaurus stellaris |
LC |
breeding (1995) |
2–6 pairs |
C6 |
Common Little Bittern Ixobrychus minutus |
LC |
breeding (2001) |
1 pairs |
C6 |
Eurasian Golden Plover Pluvialis apricaria |
LC |
passage (1997) |
4,000 birds |
C6 |
Ruff Calidris pugnax |
LC |
passage (1995) |
300 birds |
C6 |
Wood Sandpiper Tringa glareola |
LC |
passage (1995) |
40 birds |
C6 |
Black Tern Chlidonias niger |
LC |
breeding (2001) |
5 pairs |
C6 |
Common Tern Sterna hirundo |
LC |
breeding (2001) |
6 pairs |
C6 |
Hen Harrier Circus cyaneus |
LC |
resident (-) |
1 pairs |
C6 |
White-tailed Sea-eagle Haliaeetus albicilla |
LC |
breeding (2001) |
1 pairs |
C6 |
Common Kingfisher Alcedo atthis |
LC |
breeding (2001) |
5–7 pairs |
C6 |
A4iii Species group - waterbirds |
n/a |
passage (1995–1997) |
26,940 birds |
A4iii, C4 |