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Year of most recent IBA criteria assessment: 2004

Populations of IBA trigger species

Species	Current IUCN Red List Category	Season	Year(s) of estimate	Population estimate	IBA Criteria Triggered
Japanese Woodpigeon Columba janthina	NT	resident	2004	present	A2
Tristram's Storm-petrel Hydrobates tristrami	LC	passage	2004	present	A4ii
Japanese Murrelet Synthliboramphus wumizusume	VU	breeding	2004	present	A1, A4ii
Pleske's Grasshopper-warbler Locustella pleskei	VU	breeding	2004	present	A1
Ijima's Leaf-warbler Phylloscopus ijimae	VU	breeding	2004	present	A1, A2
Izu Thrush Turdus celaenops	VU	resident	2004	present	A1, A2

Note: This table presents the IBA criteria triggered and the species that triggered then at the time of assessment, the current IUCN Red List category may vary from that which was in place at that time.

For more information about the IBA assessment process and criteria please click here

Threats to the site (pressure)
Threat Level 1	Threat Level 2	Timing	Scope	Severity	Result
No known threats	no known threats	happening now	whole area/population (>90%)	no or imperceptible deterioration	low

Conservation actions taken at site (response)
Conservation Designation	Management Planning	Conservation 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	Some limited conservation initiatives are in place	medium

For more information about IBA monitoring please click here

Protection status:

Protected Area	Designation	Area (ha)	Relationship with IBA	Overlap with IBA (ha)
Tadanaejima	国指定鳥獣保護区	593	protected area overlaps with site	0
Onoharajima	国指定鳥獣保護区	546	protected area is adjacent to site	0
Fuji hakone izu	国立公園	166,767	protected area overlaps with site	1,848
Common fishery right area(Tokyo)	共同漁業権区域	102,714	protected area is adjacent to site	0

IUCN Habitat	Habitat detail	Extent (% of site)
Forest		-
Coastline	Rock stacks and islands	-

For further information about the habitat classification please click here.

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Recommended citation
BirdLife International (2021) Important Bird Areas factsheet: Kozushima island. Downloaded from http://www.birdlife.org on 20/01/2021.