LC
Common White Tern Gygis alba



Family: Laridae (Gulls, Terns, Skimmers)

Authority: (Sparrman, 1786)

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 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:

Population trend: Stable

Distribution size (breeding/resident): 137,000,000 km2

Country endemic: No

Attributes
Realm - Afrotropical
Realm - Indomalayan
Realm - Nearctic
Realm - Neotropical
Realm - Oceanic
Realm - Palearctic
IUCN Ecosystem -- Marine biome

Recommended citation
BirdLife International (2016) Species factsheet: Gygis alba. Downloaded from http://www.birdlife.org on 07/12/2016. Recommended citation for factsheets for more than one species: BirdLife International (2016) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 07/12/2016.