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Treeswifts are small to medium-sized swifts, ranging in length from 15–30 cm. They have long wings, with most of the length coming from the length of the primaries; their arms are actually quite short. They visibly differ from the other swifts in matters of plumage, which is softer, and they have crests or other facial ornaments, and long forked tails.
From Wikipedia, the free encyclopedia https://en.wikipedia.org/wiki/Treeswift
Hemiprocne coronata - Crested Treeswift