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The swift family remains one of the more complicated groups of birds in taxonomic research, but the swiftlet tribe is a rather well-defined group. Its internal systematics is confusing; the plumage is usually dull, with shades of black, brown, and gray; from their outward appearance, most species are very similar.
This flight arrangement might benefit the bird's control and maneuverability in the air. [12] The swiftlets or cave swiftlets have developed a form of echolocation for navigating through dark cave systems where they roost. [13] One species, the Three-toed swiftlet, has recently been found to use this navigation at night outside its cave roost too.
Collocalia is a genus of swifts, containing some of the smaller species termed "swiftlets".Formerly a catch-all genus for these, a number of its former members are now normally (though not by all authors) placed in Aerodramus.
The glossy swiftlet (Collocalia esculenta) is a species of swift in the family Apodidae. It is found on the Indonesian island of Sulawesi and eastwards to New Guinea , the Bismarck Archipelago and the Solomon Islands .
Seychelles swiftlet (Aerodramus elaphrus) Mascarene swiftlet (Aerodramus francicus) Indian swiftlet (Aerodramus unicolor) Philippine swiftlet (Aerodramus mearnsi) Moluccan swiftlet (Aerodramus infuscatus) Subspecies: A. i. sororum, A. i. infuscatus, & A. i. ceramensis. Sulawesi swiftlet (Aerodramus sororum) Seram swiftlet (Aerodramus ceramensis)
The Himalayan swiftlet has a twittering chit-chit roosting call, and also has a piercing teeree-teeree-teeree call.. What distinguishes many, but not all, swiftlet species from other swifts and indeed almost all other birds (the oilbird being an exception) is their ability to use a simple but effective form of echolocation to navigate through the darkness of the caves where they roost at night ...
The edible-nest swiftlet (Aerodramus fuciphagus), also known as the white-nest swiftlet, is a small bird of the swift family which is found in Southeast Asia. Its opaque and whitish bird nest is made exclusively of solidified saliva and is the main ingredient of bird's nest soup , a delicacy of Chinese cuisine.
The ridgetop swiftlet (Collocalia isonota) is a small bird in the swift family Apodidae. It is endemic to the Philippines where it is found on Luzon, Mindanao and the Sulu Archipelago. Its natural habitat is tropical moist lowland forests. It was previously considered a subspecies of the glossy swiftlet.