The site was identified as internationally important for bird conservation in 2016 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 |
Swan Goose Anser cygnoid |
EN |
breeding (1970) |
rare |
A1 |
Scaly-sided Merganser Mergus squamatus |
EN |
passage (1995) |
rare |
A1 |
Harlequin Duck Histrionicus histrionicus |
LC |
winter (1998) |
min 500 birds |
A4i |
Baer's Pochard Aythya baeri |
CR |
breeding (1995) |
uncommon |
A1, A3 |
Baikal Teal Sibirionetta formosa |
LC |
passage (1970) |
uncommon |
A1 |
Falcated Duck Mareca falcata |
LC |
passage (1998) |
2,000–5,000 birds |
A4i |
Great Crested Grebe Podiceps cristatus |
LC |
passage (1998) |
min 400 birds |
A4i |
White-naped Crane Grus vipio |
VU |
passage (1993) |
min 300 birds |
A1, A4i |
Red-crowned Crane Grus japonensis |
VU |
passage (1993) |
min 250 birds |
A1, A4i |
Oriental Stork Ciconia boyciana |
EN |
passage (1995) |
rare |
A1 |
Schrenck's Bittern Ixobrychus eurhythmus |
LC |
breeding (1996) |
common |
A3 |
Chinese Egret Egretta eulophotes |
VU |
breeding (1998) |
uncommon |
A1 |
Japanese Cormorant Phalacrocorax capillatus |
LC |
breeding (2000) |
min 2,396 birds |
A4i |
Northern Lapwing Vanellus vanellus |
NT |
passage (1998) |
min 650 birds |
A4i |
Spoon-billed Sandpiper Calidris pygmaea |
CR |
passage (1983) |
rare |
A1 |
Common Greenshank Tringa nebularia |
LC |
passage (1998) |
min 650 birds |
A4i |
Spotted Greenshank Tringa guttifer |
EN |
passage (1983) |
rare |
A1 |
Black-tailed Gull Larus crassirostris |
LC |
breeding (1982–1993) |
33,490–42,500 pairs |
A4i |
Spectacled Guillemot Cepphus carbo |
LC |
breeding (1982–1993) |
1,242–1,650 pairs |
A4ii |
Steller's Sea-eagle Haliaeetus pelagicus |
VU |
winter (1995) |
uncommon |
A1 |
Japanese Bush-warbler Horornis diphone |
LC |
breeding (1996) |
common |
A3 |
Jankowski's Bunting Emberiza jankowskii |
EN |
breeding (1998) |
present |
A1, A3 |
Ochre-rumped Bunting Emberiza yessoensis |
NT |
breeding (1996) |
frequent |
A3 |
A4iii Species group - waterbirds |
n/a |
breeding (1993) |
min 73,440 birds |
A4iii |