Family Swifts (Apodidae)


Mariana Swiftlet (Aerodramus bartschi)


French: Salangane de Guam German: Marianensalangane Spanish: Salangana de Guam
Other common names: Guam Swiftlet

Collocalia bartschi


, 1909,



Has been thought to be close to A. vanikorensis, A. inquietus, A. pelewensis and A. salangana; all were formerly considered conspecific. Previously lumped with A. pelewensis, and sometimes associated also with A. fuciphagus germani and A. f. inexpectatus. Considered a race of A. inquietus by some authors. Monotypic.


Northern Mariana Is (Saipan and Aguijan; extirpated from Rota and Tinian) and Guam.

Introduced to Oahu, Hawaii.

Descriptive notes

11 cm; 6·5–8 g. A small swiftlet with a moderately forked tail; warm brown upperparts lacking sheen and with uniform rump; underparts darker grey beneath silver-... read more


Described as weak chirps and twitterings.


Occurs over a wide range of cleared and forested habitats in interior and on coast, including... read more

Food and feeding

Tends to be most noticeably gregarious in evenings when large groups feed very low, not moving up and away until nightfall. Feeding times... read more


Active colonies Mar–May, but on Oahu (Hawaii), where introduced, nesting has been recorded year-round, albeit with a peak in May... read more


Nomadic movements account for occasional temporary gatherings at dusk or for longer periods, and... read more

Status and conservation

ENDANGERED. Previously considered not globally threatened. Restricted-range species: present in Mariana Islands EBA. Marked decline seems apparent since species was recorded... read more

Recommended citation

Chantler, P., Boesman, P. & Kirwan, G.M. (2020). Mariana Swiftlet (Aerodramus bartschi). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from on 9 April 2020).