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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
Common Tern Sterna hirundo	LC	breeding	1998	981 nests	A4i
Razorbill Alca torda	LC	breeding	1998	700 breeding pairs	A4ii

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)
Machias Seal Island Migratory Bird Sanctuary	Migratory Bird Sanctuary	1,046	protected area contained by site	650

IUCN Habitat	Habitat detail	Extent (% of site)
Marine Neritic		-

For further information about the habitat classification please click here.

Land-use	Extent (% of site)
nature conservation and research	-
fisheries/aquaculture	-
tourism/recreation	-

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

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Recommended citation
BirdLife International (2023) Important Bird Areas factsheet: Machias Seal Island. Downloaded from http://www.birdlife.org on 20/03/2023.