Mariana Swiftlet Aerodramus bartschi

Family: Apodidae (Swifts)

Authority: (Mearns, 1909)

Red List Category

Criteria: A2e+3e+4e

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Justification of Red List category
This species qualifies as Endangered because it has undergone a rapid population decline, due to depredation by the introduced brown tree snake Boiga irregularis on Guam and perhaps pesticide use elsewhere. There is a risk of rapid decline should the brown tree snake colonise Saipan, its stronghold. Fortunately, there has been little evidence of brown tree-snakes colonising any islands outside of Guam, and this species might be down-listed after a more detailed assessment of this threat.

Population size: 2500-9999

Population trend: Decreasing

Extent of occurrence (breeding/resident): 4,400 km2

Country endemic: No

Land-mass type - oceanic island
Realm - Oceanic
IUCN Ecosystem -- Terrestrial biome

Recommended citation
BirdLife International (2023) Species factsheet: Aerodramus bartschi. Downloaded from http://www.birdlife.org on 27/01/2023. Recommended citation for factsheets for more than one species: BirdLife International (2023) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 27/01/2023.