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Year of most recent IBA criteria assessment: 2001

Populations of IBA trigger species

Species	Current IUCN Red List Category	Season	Year(s) of estimate	Population estimate	IBA Criteria Triggered
African Penguin Spheniscus demersus	EN	resident	-	1,000-3,000 breeding pairs	A1, A4ii
African Penguin Spheniscus demersus	EN	non-breeding	-	4,000-10,000 individuals	A1, A4ii
Cape Gannet Morus capensis	EN	resident	-	1,300 breeding pairs	A1, A4ii
Cape Gannet Morus capensis	EN	non-breeding	-	10,000 individuals	A1, A4ii
Bank Cormorant Phalacrocorax neglectus	EN	resident	-	679 breeding pairs	A1, A4i
Bank Cormorant Phalacrocorax neglectus	EN	non-breeding	-	2,000 individuals	A1, A4i
African Oystercatcher Haematopus moquini	LC	non-breeding	-	present	A1
A4iii Species group - seabirds	n/a	non-breeding	-	10,000-19,999 individuals	A4iii
A4iii Species group - seabirds	n/a	resident	-	10,000 individuals	A4iii

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

Protected Area	Designation	Area (ha)	Relationship with IBA	Overlap with IBA (ha)
Namibian Islands Marine Protected Area	Marine Protected Area	949,700	protected area contains site	0
Namibia Islands	Marine Protected Area	955,525	protected area contains site	3

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

For further information about the land use classification please click here.

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Recommended citation
BirdLife International (2022) Important Bird Areas factsheet: Mercury Island. Downloaded from http://www.birdlife.org on 10/08/2022.