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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 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.
Nesting mossy-nest swiftlets. The nest of many species is glued to a vertical surface with saliva, and the genus Aerodramus use only that substance, which is the basis for bird's nest soup. Other swifts select holes and small cavities in walls. [15] The eggs hatch after 19 to 23 days, and the young leave the nest after a further six to eight weeks.
Swiftlet nests have been used as a delicacy for over 400 years, most often as soup. [1] They are particularly prized in Chinese cuisine due to the rarity, high protein content and rich flavor, and are among the most expensive animal products consumed by humans, [ 2 ] with prices up to about $4,300 per pound ($9,500/kg) depending on grading. [ 3 ]
Aerodramus swiftlets, depending on species, weigh 8–35 grammes (0.28–1.23 oz) and are 9–16 centimetres (0.28–1.23 in) long. These swiftlets are very similar, and where several species occur, such as Borneo , New Guinea and the Philippines , may not be separable in the field.
The Indian Swiftlet or Indian Edible-Nest Swiftlet (Aerodramus unicolor) is a small swift. It is a common resident colonial breeder in the hills of Sri Lanka and south west India. The half-cup nest is built on a vertical surface, often in a cave. The male swift uses thick saliva to construct the white, shiny nest into which two eggs are laid.
The mountain swiftlet is a medium-sized swiftlet, 11–13 cm long. It has dark brown upperparts and paler grey undersides. The tail is slightly forked. The subspecies vary slightly from the nominate race, A. h. baru has browner underparts and darker upperparts, while A. h. excelsus is larger than the nominate race.
The white-rumped swiftlet (Aerodramus spodiopygius) is a species of swift in the family Apodidae. It is found in American Samoa, Fiji, New Caledonia, Papua New Guinea, Samoa, the Solomon Islands, Tonga, and Vanuatu. Birds in Australia are now treated as a separate species, the Australian swiftlet (Aerodramus terraereginae).