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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 ('triggering') IBA criteria.

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

Species	Red List	Season (year/s of estimate)	Size	IBA criteria
Black-tailed Gull Larus crassirostris	LC	breeding (2003)	present	A4i
Japanese Robin Larvivora akahige	LC	breeding (2003)	present	A3

Ideally the conservation status of the IBA will have been checked regularly since the site was first identified in 2004. The most recent assessment (2015) is shown below.

State (condition of the trigger species' habitats)
Habitat	Quantity (% remaining)	Quality (% carrying capacity)	Result
Grassland	good (>90%)	very poor (<40%)	very poor

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Invasive and other problematic species and genes	happe­ning now	most of popul­ation/area (50–90%)	moderate decline (10–30% over 3 gener­ations)	high

Response (conservation actions taken for the trigger species and/or their habitats)
Designation	Planning	Action	Result
Whole area (>90%) covered by appropriate conservation designation	No management planning has taken place	Some limited conservation initiatives are in place	low

Year	Protected Area	Designation (management category)	% coverage of IBA
1974	Rishiri rebun sarobetsu	国立公園 (II)	47
1985	Rishiri	都道府県指定鳥獣保護区 (IV)	95
1985	Rishiri	Prefectural Wildlife Protection Area (-)	100

Habitat	% of IBA	Habitat detail
Grassland	-
Marine Coastal/Supratidal	-

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Rishiri island (Japan). Downloaded from https://datazone.birdlife.org/site/factsheet/rishiri-island-iba-japan on 26/12/2024.