This 13cm long species is mainly pale brown in colour. It has long swept-back wings that resemble a crescent or a boomerang. The body is slender, and the tail is long and deeply forke, although it is usually held closed. The call is a loud shrill scream. Sexes are similar, and young birds differ mainly their shorter tails. Asian Palm Swift has very short legs which it uses only for clinging to vertical surfaces, since swifts never settle voluntarily on the ground. The down and feather nest is glued to the underside of a palm leaf with saliva, which is also used to secure the usually two or three eggs.
These swifts spend most of their lives in the air, living on the insects they catch in their beaks. Asian Palm Swifts often feed near the ground, and they drink on the wing.
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