Family: Stercorariidae (Skuas)
Authority: (Bonaparte, 1857)
Red List Category:
Sources: Esri, HERE, Garmin, Intermap, Increment P Corp, GEBCO, USGS, FAO, NPS, NRCAN, Kadaster NL, Ordnance Survey, Esri Japan, METI, Esri China (Hong Kong), © OpenStreetMap contributors and the GIS User Community. Powered by Esri
Justification of Red List categoryThis species has a very large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km
2 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 may be small, but it is not believed to 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:
2500-9999 mature individuals
Population trend:
stable
Extent of occurrence (breeding/resident):
1,140,000 km
2
Country endemic:
no
Attributes
Realm - Neotropical
Realm - Antarctic
IUCN System - Terrestrial
IUCN System - Marine