The site was identified as internationally important for bird conservation in 1994 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 |
White-headed Duck Oxyura leucocephala |
EN |
passage (1977) |
25 birds |
A1 |
Mute Swan Cygnus olor |
LC |
winter (1977–1992) |
2,200–2,530 birds |
A4i, B1i |
Whooper Swan Cygnus cygnus |
LC |
winter (1977–1992) |
711–849 birds |
A4i, B1i |
Tundra Swan Cygnus columbianus |
LC |
winter (1977–1992) |
16–51 birds |
A4i, B1i |
Greylag Goose Anser anser |
LC |
winter (1977) |
1,500 birds |
B1i |
Greater White-fronted Goose Anser albifrons |
LC |
winter (1970–1977) |
500 birds |
A4i, B1i |
Lesser White-fronted Goose Anser erythropus |
VU |
winter (1977) |
32 birds |
A1 |
Smew Mergellus albellus |
LC |
winter (1970–1977) |
382 birds |
A4i, B1i |
Common Pochard Aythya ferina |
VU |
winter (1970–1977) |
65,000 birds |
A4i, B1i |
Ferruginous Duck Aythya nyroca |
NT |
passage (1977) |
130 birds |
A1, B1i, B2 |
Ferruginous Duck Aythya nyroca |
NT |
winter (1970–1977) |
51 birds |
B1i |
Tufted Duck Aythya fuligula |
LC |
winter (1970–1977) |
34,500 birds |
A4i, B1i |
Garganey Spatula querquedula |
LC |
passage (1977) |
3,850 birds |
A4i, B1i |
Northern Shoveler Spatula clypeata |
LC |
winter (1970–1977) |
24,300 birds |
A4i, B1i |
Gadwall Mareca strepera |
LC |
winter (1977–1992) |
7,850–14,900 birds |
A4i, B1i |
Eurasian Wigeon Mareca penelope |
LC |
winter (1970–1977) |
30,000 birds |
A4i, B1i |
Mallard Anas platyrhynchos |
LC |
winter (1970–1977) |
67,800 birds |
A4i, B1i |
Northern Pintail Anas acuta |
LC |
winter (1970–1977) |
55,000 birds |
A4i, B1i |
Common Teal Anas crecca |
LC |
winter (1970–1977) |
540,000 birds |
A4i, B1i |
Great Crested Grebe Podiceps cristatus |
LC |
winter (1970–1977) |
260 birds |
A4i, B1i |
Black-necked Grebe Podiceps nigricollis |
LC |
winter (1970–1977) |
300 birds |
A4i, B1i |
Eurasian Coot Fulica atra |
LC |
winter (1970–1977) |
106,400 birds |
A4i, B1i |
Black-crowned Night Heron Nycticorax nycticorax |
LC |
winter (1970–1977) |
250 birds |
B1i |
Squacco Heron Ardeola ralloides |
LC |
breeding (1977) |
150 pairs |
B1i |
Squacco Heron Ardeola ralloides |
LC |
passage (1977) |
900 birds |
B1i |
Cattle Egret Bubulcus ibis |
LC |
passage (1977) |
620 birds |
B1i |
Little Egret Egretta garzetta |
LC |
breeding (1977) |
150 pairs |
B1i |
Little Egret Egretta garzetta |
LC |
passage (1977) |
585 birds |
A4i, B1i |
Little Egret Egretta garzetta |
LC |
winter (1970–1977) |
300 birds |
B1i |
Pygmy Cormorant Microcarbo pygmaeus |
LC |
winter (1977–1992) |
410–650 birds |
A1, B1i, B2 |
Great Cormorant Phalacrocorax carbo |
LC |
passage (1977) |
4,200 birds |
A4i, B1i |
Northern Lapwing Vanellus vanellus |
NT |
winter (1977–1992) |
2,710–5,630 birds |
A4i, B1i |
Sociable Lapwing Vanellus gregarius |
CR |
passage (1968–1969) |
1–8 birds |
A1, A4i |
Whimbrel Numenius phaeopus |
LC |
passage (1977) |
112 birds |
B1i |
Black-tailed Godwit Limosa limosa |
NT |
winter (1970–1977) |
1,380 birds |
A4i, B1i |
Common Redshank Tringa totanus |
LC |
winter (1977) |
700 birds |
B1i |
Little Gull Hydrocoloeus minutus |
LC |
winter (1970–1977) |
1,750 birds |
A4i, B1i |
Black-headed Gull Larus ridibundus |
LC |
winter (1977–1992) |
1,000–2,510 birds |
A4i, B1i |
Whiskered Tern Chlidonias hybrida |
LC |
breeding (1977) |
2,000–4,000 pairs |
A4i, B1i |
Greater Spotted Eagle Clanga clanga |
VU |
winter (1977) |
24 birds |
A1, B2 |
Eastern Imperial Eagle Aquila heliaca |
VU |
winter (1977) |
6 birds |
B2 |
White-tailed Sea-eagle Haliaeetus albicilla |
LC |
winter (1977) |
20 birds |
A1, B2 |
A4iii Species group - waterbirds |
n/a |
winter (1970–1977) |
500,000-999,999 birds |
A4iii |