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

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
Black-tailed Gull Larus crassirostris	LC	resident	2003	present	A4i

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 (2015) is shown below.

Pressure (threats to the trigger species and/or their habitats)
Threat	Timing	Scope	Severity	Result
Geological events	past (and unlikely to return) and no longer limiting	small area/few individuals (<10%)	no or imperceptible deterioration	low

Response (conservation actions taken for the trigger species and/or their habitats)
Protected areas	Management plan	Other action	Result
Whole area of site (>90%) covered by appropriate conservation designation	A comprehensive and appropriate management plan exists that aims to maintain or improve the populations of qualifying bird species	Very little or no conservation action taking place	medium

Year	Protected Area	Designation	% overlap with IBA
1994	Rikuchu - Kaigan	National Park	100
2003	Common fishery right area(Iwate)	共同漁業権区域	13
2013	Sanriku Fukko (reconstruction)	国立公園	100

Habitat1	Habitat detail	% of IBA
Marine Coastal/Supratidal		-

1. IUCN Habitat classification.

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Recommended citation
BirdLife International (2024) Important Bird Area factsheet: Tshubakijima, Aomatsusima islets (Japan). Downloaded from https://datazone.birdlife.org/site/factsheet/tshubakijima-aomatsusima-islets-iba-japan on 23/11/2024.