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The site was identified as important in 2004 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species') at the site:

Species	Red List1	Season	Year(s)	Size	IBA criteria
Tundra Swan Cygnus columbianus	LC	breeding	1994-1997	200-300 breeding pairs	A3
Greater White-fronted Goose Anser albifrons	LC	breeding	1997	present	A3
Long-tailed Duck Clangula hyemalis	VU	breeding	1997	abundant	A3
Spectacled Eider Somateria fischeri	NT	breeding	1993	1,000-2,000 breeding pairs	A3, A4i
King Eider Somateria spectabilis	LC	breeding	1997	2,000 breeding pairs	A3, A4i
Common Eider Somateria mollissima	NT	breeding	1993	3,000 breeding pairs	A3, A4i
Greater Scaup Aythya marila	LC	breeding	1997	uncommon	A3
Sandhill Crane Grus canadensis	LC	breeding	1997	frequent	A3
Pacific Loon Gavia pacifica	LC	breeding	1997	common	A4i
Yellow-billed Loon Gavia adamsii	NT	breeding	1997	rare	A3
Grey Plover Pluvialis squatarola	VU	breeding	1997	present	A3
Ruddy Turnstone Arenaria interpres	NT	breeding	1997	present	A3
Dunlin Calidris alpina	NT	breeding	1997	common	A3
Glaucous Gull Larus hyperboreus	LC	breeding	1997	frequent	A3

1. The current IUCN Red List category. The category at the time of the IBA criteria assessment (2004) may differ.

Habitat1	Habitat detail	% of IBA
Grassland	Tundra	major (>10)
Marine Coastal/Supratidal		major (>10)
Marine Intertidal		major (>10)

1. IUCN Habitat classification.

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: West Chaun plain (Russia (Asian)). Downloaded from https://datazone.birdlife.org/site/factsheet/west-chaun-plain-iba-russia-(asian) on 22/11/2024.