Family: Stercorariidae (Skuas)

Authority: Vieillot, 1819

Red List Category:

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 trend appears to be stable, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). 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). For these reasons the species is evaluated as Least Concern.

Population size: 250000-749999 mature individuals

Population trend: stable

Extent of occurrence (breeding/resident): 34,800,000 km²

Country endemic: no

Attributes
Realm - Indomalayan
Realm - Nearctic
Realm - Neotropical
Realm - Oceanian
Realm - Palearctic
Realm - Antarctic
IUCN System - Terrestrial
IUCN System - Marine