© António Gonçalves
© Steve Kelling
© Dan Rabosky
© James Barber

Huisgierzwaluw Apus affinis

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Identification

POWERED BY MERLIN

Small swift with a square-tipped tail, broad outer wings and sharply-demarcated white rump. White on the rump extends to the sides and is visible from below. Note the obvious contrasting white throat. Superficially similar to house-martins, but lacks a white belly. Breeds both in natural cliff settings and in urban areas where it nests on buildings. Very vocal, particularly near the nest, giving a constant descending trill.

POWERED BY MERLIN