IBA Justification

Year of most recent IBA criteria assessment: 2000

Populations of IBA trigger species
Species Current IUCN Red List Category Season Year(s) of estimate Population at site IBA criteria triggered
European Storm-petrel Hydrobates pelagicus LC breeding 1989 5,000 breeding pairs A4ii, B1ii, B2
Atlantic Puffin Fratercula arctica VU breeding 1989 25,000 breeding pairs B1ii
Black Guillemot Cepphus grylle LC breeding 1989 50 breeding pairs A4ii, B1ii
A4iii Species group - seabirds n/a breeding 1989 20,000-49,999 breeding pairs A4iii

Note: The current IUCN Red List category may differ from the category that was valid at the time of IBA criteria assessment.

For more information about the IBA criteria, please click here


IUCN Habitat Habitat detail Extent (% of site)
Grassland -
Marine Coastal/Supratidal -
For further information about the IUCN habitat classification, please click here.

Land use

Land-use Extent (% of site)
agriculture -
For further information about the land-use classification, please click here.

Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Hestur. Downloaded from on 08/06/2023.