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 |
Mute Swan Cygnus olor |
LC |
winter (1990–1999) |
15,000 birds |
A4i, B1i, C3 |
Whooper Swan Cygnus cygnus |
LC |
winter (1990–1999) |
2,500 birds |
A4i, B1i, B3, C2, C6 |
Tundra Swan Cygnus columbianus |
LC |
winter (1990–1999) |
600 birds |
A4i, B1i, B2, C2 |
Barnacle Goose Branta leucopsis |
LC |
winter (1990–1999) |
16,200 birds |
A4i, B1i, B2, C2, C6 |
Greylag Goose Anser anser |
LC |
winter (1990–1999) |
41,000 birds |
A4i, B1i, C3 |
Bean Goose Anser fabalis |
LC |
winter (1990–1999) |
4,000 birds |
A4i, B1i, C3 |
Greater White-fronted Goose Anser albifrons |
LC |
winter (1990–1999) |
40,000 birds |
A4i, B1i, C3 |
Long-tailed Duck Clangula hyemalis |
VU |
winter (1990–1999) |
100,000 birds |
A4i, B1i, C3 |
Common Goldeneye Bucephala clangula |
LC |
winter (1990–1999) |
5,000 birds |
A4i, B1i, C3 |
Smew Mergellus albellus |
LC |
winter (1990–1999) |
1,000 birds |
A4i, B1i, C2 |
Goosander Mergus merganser |
LC |
winter (1990–1999) |
2,000 birds |
B1i, C3 |
Red-breasted Merganser Mergus serrator |
LC |
winter (1990–1999) |
3,000 birds |
A4i, B1i, C3 |
Common Pochard Aythya ferina |
VU |
winter (1990–1999) |
10,000 birds |
B1i, C3 |
Tufted Duck Aythya fuligula |
LC |
winter (1990–1999) |
10,000 birds |
B1i, C3 |
Greater Scaup Aythya marila |
LC |
winter (1990–1999) |
30,000 birds |
A4i, B1i, B2, C3 |
Northern Shoveler Spatula clypeata |
LC |
winter (1990–1999) |
2,000 birds |
B1i, C3 |
Gadwall Mareca strepera |
LC |
winter (1990–1999) |
2,000 birds |
A4i, B1i, C3 |
Gadwall Mareca strepera |
LC |
breeding (1991–1999) |
87 pairs |
B2 |
Eurasian Wigeon Mareca penelope |
LC |
winter (1990–1999) |
50,000 birds |
A4i, B1i, C3 |
Northern Pintail Anas acuta |
LC |
winter (1990–1999) |
1,500 birds |
B1i, C3 |
Common Teal Anas crecca |
LC |
winter (1990–1999) |
11,200 birds |
B1i, C3 |
Horned Grebe Podiceps auritus |
VU |
winter (1990–1999) |
300 birds |
A4i, B1i, C2, C6 |
Common Crane Grus grus |
LC |
winter (1990–1999) |
40,000 birds |
A4i, B1i, C2, C6 |
White Stork Ciconia ciconia |
LC |
breeding (1994) |
27 pairs |
C6 |
Great Cormorant Phalacrocorax carbo |
LC |
winter (1990–1999) |
15,000 birds |
A4i, B1i, C3 |
Pied Avocet Recurvirostra avosetta |
LC |
breeding (1990–1999) |
173 pairs |
B3, C6 |
Pied Avocet Recurvirostra avosetta |
LC |
winter (1990–1999) |
1,500–2,330 birds |
A4i, B1i, B2, C2, C6 |
Grey Plover Pluvialis squatarola |
VU |
winter (1990–1999) |
2,000 birds |
A4i, B1i, C3 |
Eurasian Golden Plover Pluvialis apricaria |
LC |
winter (1990–1999) |
20,000–30,000 birds |
A4i, B1i, C2, C6 |
Bar-tailed Godwit Limosa lapponica |
NT |
passage (1990–1999) |
1,100 birds |
A4i, B1i, C2 |
Ruff Calidris pugnax |
LC |
breeding (1990–1999) |
28 pairs |
C6 |
Dunlin Calidris alpina |
NT |
passage (1990–1999) |
30,000 birds |
A4i, B1i, C3 |
Little Gull Hydrocoloeus minutus |
LC |
non-breeding (1990–1999) |
800 birds |
A4i, B1i, C3 |
Mediterranean Gull Larus melanocephalus |
LC |
breeding (1990–1999) |
6 pairs |
C6 |
Little Tern Sternula albifrons |
LC |
breeding (1990–1999) |
103 pairs |
B2, C6 |
Caspian Tern Hydroprogne caspia |
LC |
breeding (1990–1999) |
1 pairs |
C6 |
Caspian Tern Hydroprogne caspia |
LC |
non-breeding (1990–1999) |
400 birds |
A4i, B1i, C2, C6 |
Common Tern Sterna hirundo |
LC |
breeding (1990–1999) |
400–1,400 pairs |
C6 |
Sandwich Tern Thalasseus sandvicensis |
LC |
breeding (1990–1999) |
1,000 pairs |
B2, C6 |
Short-eared Owl Asio flammeus |
LC |
breeding (1990–1999) |
3 pairs |
C6 |
Western Marsh-harrier Circus aeruginosus |
LC |
breeding (1987) |
5 pairs |
C6 |
Hen Harrier Circus cyaneus |
LC |
winter (1990–1999) |
10–50 birds |
C6 |
White-tailed Sea-eagle Haliaeetus albicilla |
LC |
breeding (1990–1999) |
14 pairs |
A1, B2, C1, C6 |
White-tailed Sea-eagle Haliaeetus albicilla |
LC |
winter (1990–1999) |
50–70 birds |
C6 |
Peregrine Falcon Falco peregrinus |
LC |
breeding (1990–1999) |
1 pairs |
C6 |
Peregrine Falcon Falco peregrinus |
LC |
winter (1990–1999) |
10–20 birds |
C6 |
Collared Sand Martin Riparia riparia |
LC |
breeding (1990–1999) |
3,200 pairs |
B2 |
Barred Warbler Curruca nisoria |
LC |
breeding (1991–1999) |
100 pairs |
C6 |
A4iv Species group - soaring birds/cranes |
n/a |
passage (1990–1999) |
40,000 birds |
A4iv, B1iv, C5 |
A4iii Species group - waterbirds |
n/a |
winter (1990–1999) |
425,800–436,630 birds |
A4iii, C4 |
A4iii Species group - waterbirds |
n/a |
passage (1990–1999) |
31,100 birds |
A4iii, C4 |