Strait of Gibraltar

IBA Criteria

Year of most recent IBA criteria assessment: 2007

Populations of IBA trigger species
Species Current IUCN Red List Category Season Year(s) of estimate Population estimate IBA Criteria Triggered
Calonectris diomedea NR passage - 10,000-100,000 individuals A4ii, B1ii, C2
Balearic Shearwater Puffinus mauretanicus CR passage - 1,001-10,000 individuals A1, A4ii, B1ii, C1, C2
Audouin's Gull Larus audouinii LC passage - 1,001-10,000 individuals A1, A4i, B1i, C1, C2
Audouin's Gull Larus audouinii LC winter - 51-100 individuals A1, C1
Lesser Black-backed Gull Larus fuscus LC passage - 1,001-10,000 individuals A4i, B1i, C3
Larus cachinnans NR breeding - 12,000 breeding pairs A4i, B1i, C3
Larus cachinnans NR winter - 1,001-10,000 individuals A4i, B1i, C3
Atlantic Puffin Fratercula arctica VU passage - 1,001-10,000 individuals B1ii, C3
Razorbill Alca torda NT passage - 1,001-10,000 individuals A4ii, B1ii, C3
A4iii Species group - waterbirds n/a breeding - 20,000-49,999 individuals A4iii, C4
A4iii Species group - seabirds n/a passage - 50,000-99,999 individuals A4iii, C4

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


IUCN Habitat Habitat detail Extent (% of site)
Sea Open Sea, Sea inlets and coastal features -
For further information about the habitat classification please click here.

Land use

Land-use Extent (% of site)
urban/industrial/transport -
tourism/recreation -
fisheries/aquaculture -
For further information about the land use classification please click here.

Recommended citation
BirdLife International (2020) Important Bird Areas factsheet: Strait of Gibraltar. Downloaded from on 03/04/2020.