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 |
Common Goldeneye Bucephala clangula |
LC |
winter (1970–1977) |
813 birds |
B1i |
Red-crested Pochard Netta rufina |
LC |
winter (1970–1977) |
2,385 birds |
B1i |
Tufted Duck Aythya fuligula |
LC |
winter (1970–1977) |
39,900 birds |
A4i, B1i |
Northern Shoveler Spatula clypeata |
LC |
winter (1970–1977) |
4,350 birds |
A4i, B1i |
Gadwall Mareca strepera |
LC |
winter (1970–1977) |
3,250 birds |
A4i, B1i |
Eurasian Wigeon Mareca penelope |
LC |
winter (1970–1977) |
12,900 birds |
A4i, B1i |
Mallard Anas platyrhynchos |
LC |
winter (1970–1977) |
170,000 birds |
A4i, B1i |
Common Teal Anas crecca |
LC |
winter (1970–1977) |
171,000 birds |
A4i, B1i |
Great Crested Grebe Podiceps cristatus |
LC |
winter (1970–1977) |
8,875 birds |
A4i, B1i |
Black-necked Grebe Podiceps nigricollis |
LC |
winter (1970–1977) |
760 birds |
A4i, B1i |
Red-throated Loon Gavia stellata |
LC |
winter (1977) |
2 birds |
A4i, B1i |
Dalmatian Pelican Pelecanus crispus |
NT |
winter (1970–1977) |
83 birds |
A1, A4i, B1i |
Great Cormorant Phalacrocorax carbo |
LC |
winter (1970–1977) |
3,500 birds |
A4i, B1i |
Kentish Plover Charadrius alexandrinus |
LC |
passage (1977) |
340 birds |
B1i |
Whimbrel Numenius phaeopus |
LC |
passage (1977) |
310 birds |
B1i |
Ruddy Turnstone Arenaria interpres |
NT |
passage (1977) |
275 birds |
B1i |
Sanderling Calidris alba |
LC |
passage (1977) |
2,070 birds |
A4i, B1i |
Little Gull Hydrocoloeus minutus |
LC |
winter (1970–1977) |
700 birds |
B1i |
Black-headed Gull Larus ridibundus |
LC |
winter (1970–1977) |
7,600 birds |
A4i, B1i |
Mew Gull Larus canus |
LC |
winter (1970–1977) |
960 birds |
B1i |
Little Tern Sternula albifrons |
LC |
passage (1977) |
1,100 birds |
A4i, B1i |
White-tailed Sea-eagle Haliaeetus albicilla |
LC |
resident (1977) |
common |
A1, B2 |
A4iii Species group - waterbirds |
n/a |
winter (1970–1977) |
100,000-499,999 birds |
A4iii |