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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
Japanese Woodpigeon Columba janthina	LC	resident	2003	present	A2
Pleske's Grasshopper-warbler Helopsaltes pleskei	VU	breeding	2003	present	A1

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

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
No known threats	happening now	whole area/population (>90%)	no or imperceptible deterioration	low

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other action	Result
Little/none of site covered (<10%)	No management plan exists but the management planning process has begun	Unknown	negligible

Year	Protected Area	Designation	% overlap with IBA
-	Koshikijima Islands Wildlife Protection Area (Local)	Other	-
1981	Koshiki jima	都道府県立自然公園	20
1989	Kashima	都道府県指定鳥獣保護区	3
1994	Kashima minami	都道府県指定鳥獣保護区	4

Habitat1	Habitat detail	% of IBA
Forest		-
Marine Coastal/Supratidal		-

1. IUCN Habitat classification.

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Koshikijima islands (Japan). Downloaded from https://datazone.birdlife.org/site/factsheet/koshikijima-islands-iba-japan on 22/11/2024.