Apodiformes has over 400 bird species and out of these about sixteen are found in India. Traditionally Apodiformes have contained three families: Apodidae (swifts and swiftlets), Hemiprocnidae (treeswifts) and Trochilidae (hummingbirds). But in the Sibley-Ahlquist taxonomy, the largest family Trochilidae (319 species) has been separated from Apodiformes to form a new order Trochiliformes. Birds belonging to Trochilidae or Trochiliformes are not found in India.
Birds belonging to the Apodiformes order are small to very small, with short legs, tiny feet and a short humerus. In addition, they have long
primaries and short secondaries as adaptations for their characteristic flying method. Their eggs are white, elongated and rounded at both ends. The altricial young hatch
blind and naked.
Family: Apodidae (Cypseloidinae, Apodinae. world total: 99 species)
Sub-family: Apodinae (tribes Collocaliini, Chaeturini and Apodini)
Himalayan Swiftlet Collocalia brevirostris - local resident
Asian Palm-Swift Cypsiurus balasiensis - widespread resident
Family: Hemiprocnidae (world total: 4 species)
Crested Treeswift Hemiprocne coronata - widespread scarce resident