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 (1990–1999) |
1,900 birds |
A4i, B1i, B3, C2, C6 |
Tundra Swan Cygnus columbianus |
LC |
passage (1990–1999) |
2,000 birds |
A4i, B1i, C2 |
Barnacle Goose Branta leucopsis |
LC |
passage (1990–1999) |
350 birds |
C2, C6 |
Bean Goose Anser fabalis |
LC |
passage (1990–1999) |
35,000 birds |
A4i, B1i, C3 |
Greater White-fronted Goose Anser albifrons |
LC |
passage (1997) |
17,500 birds |
A4i, B1i, C3 |
Northern Shoveler Spatula clypeata |
LC |
passage (1990–1999) |
400 birds |
B1i, C3 |
Northern Pintail Anas acuta |
LC |
passage (1990–1999) |
600 birds |
B1i, C3 |
European Nightjar Caprimulgus europaeus |
LC |
resident (1997) |
10–20 pairs |
C6 |
Corncrake Crex crex |
LC |
breeding (1990–1999) |
5–21 pairs |
C1 |
Spotted Crake Porzana porzana |
LC |
resident (1997) |
5–10 pairs |
B1i |
Little Crake Zapornia parva |
LC |
resident (1997) |
2–5 pairs |
C6 |
Common Crane Grus grus |
LC |
winter (1990–1999) |
4,500 birds |
A4i, B1i, C2, C6 |
Common Crane Grus grus |
LC |
breeding (1990–1999) |
30–32 pairs |
C6 |
White Stork Ciconia ciconia |
LC |
breeding (1990–1999) |
110 pairs |
B2, C6 |
Eurasian Bittern Botaurus stellaris |
LC |
breeding (1997) |
2 pairs |
B1i, C2 |
Eurasian Golden Plover Pluvialis apricaria |
LC |
passage (1990–1999) |
4,200 birds |
C6 |
Northern Lapwing Vanellus vanellus |
NT |
passage (1990–1999) |
77,000 birds |
A4i, B1i, C3 |
Eurasian Eagle-owl Bubo bubo |
LC |
breeding (1990–1999) |
1 pairs |
C6 |
Western Marsh-harrier Circus aeruginosus |
LC |
breeding (1990–1999) |
30–35 pairs |
C6 |
White-tailed Sea-eagle Haliaeetus albicilla |
LC |
passage (1997) |
29 birds |
C6 |
White-tailed Sea-eagle Haliaeetus albicilla |
LC |
breeding (1990–1999) |
3 pairs |
C6 |
Black Woodpecker Dryocopus martius |
LC |
breeding (1990–1999) |
50–80 pairs |
C6 |
Red-backed Shrike Lanius collurio |
LC |
breeding (1990–1999) |
300–400 pairs |
C6 |
Common Nightingale Luscinia megarhynchos |
LC |
breeding (1990–1999) |
800–1,500 pairs |
B3 |
A4iii Species group - waterbirds |
n/a |
passage (1991–1999) |
137,050 birds |
A4iii, C4 |