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Photo: Ben Costamagna (iNaturalist) · CC BY 4.0 (May be cropped or resized)
Aerodramus salangana
Habitat
Subtropical or tropical moist lowland forest
Range
Northern Borneo, the Natuna and Derawan Islands and Nias
The mossy-nest swiftlet is a swift found in northern Borneo, the Natuna and Derawan Islands and Nias island off western Sumatra, in subtropical or tropical moist lowland forest. Some taxonomists consider it a subspecies of the uniform swiftlet (Wikipedia, general species account).