• Summary
• Text account
• Data table and detailed info
• Map
• Reference and further resources

The site was identified as internationally important for bird conservation 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 List	Season (year/s of estimate)	Size	IBA criteria
Tundra Swan Cygnus columbianus	LC	passage (2003)	present	A4i

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2004. The most recent assessment (2010) is shown below.

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Energy production and mining	likely in long term (>4 years)	few indivi­duals/small area (<10%)	no or slight decline (<1% over 3 gener­ations)	low

Response (conservation actions taken for the trigger species and/or their habitats)
Designation	Planning	Action	Result
Whole area (>90%) covered by appropriate conservation designation	Unknown	Unknown	low

Year	Protected Area	Designation (management category)	% coverage of IBA
1993	Koetoi onuma	都道府県指定鳥獣保護区 (IV)	87

Habitat	% of IBA	Habitat detail
Wetlands (inland)	-

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Lake Koetoi-Onuma (Japan). Downloaded from https://datazone.birdlife.org/site/factsheet/lake-koetoi-onuma-iba-japan on 28/12/2024.