[swift-lit] 
| any of several swifts of the genus Collocalia, of southeastern Asia, the East Indies, and Australia, certain species of which use saliva to construct nests, which are used in making bird's-nest soup. |
swiftlet
(genus Collocalia), any of numerous species of cave-dwelling birds belonging to the swift family, Apodidae, found from southeastern Asia (India and Sri Lanka) and the Malay Peninsula through the Philippines, and eastward to the islands of the South Pacific
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