LC
Razorbill Alca torda



Family: Alcidae (Auks)

Authority: Linnaeus, 1758

Red List Category:

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Justification of Red List category
This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km² combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population size is very large, and hence does not approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). The population trend appears to be increasing, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). For these reasons the species is evaluated as Least Concern.

Population size: 838000-1660000 mature individuals

Population trend: increasing

Extent of occurrence (breeding/resident): 19,500,000 km2

Country endemic: no

Attributes
Realm - Nearctic
Realm - Palearctic
IUCN System - Marine

Recommended citation
BirdLife International (2025) Species factsheet: Razorbill Alca torda. Downloaded from https://datazone.birdlife.org/species/factsheet/razorbill-alca-torda on 10/01/2025.
Recommended citation for factsheets for more than one species: BirdLife International (2025) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org/species/search on 10/01/2025.