VU
Mariana Swiftlet Aerodramus bartschi



Family: Apodidae (Swifts)

Authority: (Mearns, 1909)

Red List Category

Criteria: C1

Click here for more information about the Red List categories and criteria

Justification of Red List category
This species has a small population size, with recent evidence that the stoppage of trapping for snakes on Guam has caused a reduction in population size that is precautionarily assumed to be ongoing. It therefore is assessed as Vulnerable.

Population size: 3000-5000 mature individuals

Population trend: decreasing

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

Country endemic: no

Attributes
Land-mass type - oceanic island
Realm - Oceanian
IUCN System - Terrestrial

Recommended citation
BirdLife International (2024) Species factsheet: Mariana Swiftlet Aerodramus bartschi. Downloaded from https://datazone.birdlife.org/species/factsheet/mariana-swiftlet-aerodramus-bartschi on 23/12/2024.
Recommended citation for factsheets for more than one species: BirdLife International (2024) IUCN Red List for birds. Downloaded from https://datazone.birdlife.org/species/search on 23/12/2024.