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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 IBA criteria.

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

Species	Red List	Season (year/s of estimate)	Size	IBA criteria
Bean Goose Anser fabalis	LC	passage (2003)	7,000–8,000 individuals	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 key species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Energy production and mining	likely in long term (beyond 4 years)	few individ­uals/small area (<10%)	no deteri­oration (<1% over 3 gener­ations)	low

Response (conservation actions taken for the key species and/or their habitats)
Designation	Planning	Action	Result
Some of site covered (10–49%)	A manage­ment plan exists, but it is out of date or not compre­hensive	Substantive conservation measures are being implemented, but these are not comprehensive and are limited by resources and capacity	low

Year	Protected Area	Designation (management category)	% coverage of IBA
1970	Yukuru wakasanai	都道府県指定鳥獣保護区 (IV)	22
1974	Rishiri rebun sarobetsu	国立公園 (II)	63
1992	Sarobetsu	国指定鳥獣保護区 (IV)	17
2004	Kabutonuma	都道府県指定鳥獣保護区 (IV)	2

Habitat	% of IBA	Habitat detail
Wetlands (inland)	-

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Recommended citation
BirdLife International (2025) Important Bird Area factsheet: Sarobetsu marsh (Japan). Downloaded from https://datazone.birdlife.org/site/factsheet/sarobetsu-marsh-iba-japan on 26/01/2025.