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The site was identified as important in 2001 because it was regularly supporting significant populations of the species listed below, meeting ('triggering') IBA criteria.

Populations meeting IBA criteria ('trigger species'):

Species	Current IUCN Red List Category	Season	Year(s)	Population estimate at site	IBA criteria met
Inaccessible Island Rail Laterallus rogersi	VU	resident	1989	2,500-5,000 breeding pairs	A1, A2, A4i
Southern Rockhopper Penguin Eudyptes chrysocome	VU	breeding	1990	17,000-27,000 breeding pairs	A1
White-faced Storm-petrel Pelagodroma marina	LC	breeding	1987	5,000-50,000 breeding pairs	A4ii
White-bellied Storm-petrel Fregetta grallaria	LC	breeding	1987	5,000-50,000 breeding pairs	A4ii
Atlantic Yellow-nosed Albatross Thalassarche chlororhynchos	EN	breeding	1983	1,100 breeding pairs	A1, A4ii
Tristan Albatross Diomedea dabbenena	CR	breeding	1990	2-3 breeding pairs	A1
Sooty Albatross Phoebetria fusca	EN	breeding	1987	200 breeding pairs	A1, A4ii
Broad-billed Prion Pachyptila vittata	LC	breeding	1987	50,000-500,000 breeding pairs	A4ii
Soft-plumaged Petrel Pterodroma mollis	LC	breeding	1987	5,000-50,000 breeding pairs	A4ii
Spectacled Petrel Procellaria conspicillata	VU	breeding	1999	2,500-9,999 individuals	A1, A4ii
Great Shearwater Ardenna gravis	LC	breeding	1987	1,500,000-2,000,000 breeding pairs	A4ii
Little Shearwater Puffinus assimilis	LC	breeding	1987	5,000-50,000 breeding pairs	A4ii
Antarctic Tern Sterna vittata	LC	breeding	1983	86 breeding pairs	A4i
Tristan Thrush Turdus eremita	NT	resident	1998	present	A1, A2
Inaccessible Island Finch Nesospiza acunhae	VU	resident	1998	present	A1, A2
Inaccessible Island Finch Nesospiza acunhae	VU	resident	1998	present	A1, A2
A4iii Species group - seabirds	n/a	breeding	1987-1990	5,000,000-9,999,999 individuals	A4iii

The current IUCN Red List category may differ from that which was valid at the time of IBA criteria assessment (2001).

Protected area (PA)	PA designation	PA area (ha)	Relationship of PA with IBA	Overlap of PA with IBA (ha)
Inaccessible Island	Ramsar Site, Wetland of International Importance	126,524	protected area overlaps with site	0
Inaccessible Island	Wildlife Reserve	1,400	is identical to site	1,400
Gough and Inaccessible Islands	World Heritage Site (natural or mixed)	397,900	protected area contains site	1,400

Land-use	Extent (% of site)
nature conservation and research	-

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Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Inaccessible Island. Downloaded from http://datazone.birdlife.org/site/factsheet/inaccessible-island-iba-st-helena-(to-uk) on 24/09/2023.