
1) Animals that use echolocation 2) Collocalia inexpectata 3) Swift 4) Swift of eastern asia
Found on
https://www.crosswordclues.com/clue/swiftlet

Swiftlets are birds contained within the four genera Aerodramus, Hydrochous, Schoutedenapus and Collocalia. They form the Collocaliini tribe within the swift family Apodidae. The group contains around thirty species mostly confined to southern Asia, south Pacific islands, and northeastern Australia, all within the tropical and subtropical regions....
Found on
http://en.wikipedia.org/wiki/Swiftlet

• (n.) Any one of numerous species of small East Indian and Asiatic swifts of the genus Collocalia. Some of the species are noted for furnishing the edible bird`s nest. See Illust. under Edible.
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http://thinkexist.com/dictionary/meaning/swiftlet/

(genus Collocalia), any of numerous species of cave-dwelling birds belonging to the swift family, Apodidae, found from southeastern Asia (India and ... [3 related articles]
Found on
http://www.britannica.com/eb/a-z/s/196
Swift'let noun (Zoology) Any one of numerous species of small East Indian and Asiatic swifts of the genus
Collocalia . Some of the species are noted for furnishing the edible bird's nest. See
Illust. under
Edible .
Found on
http://www.encyclo.co.uk/webster/S/258

[
n] - swift of eastern Asia
Found on
http://www.webdictionary.co.uk/definition.php?query=swiftlet
Collocalia inexpectata noun swift of eastern Asia; produces the edible bird`s nest
Found on
https://www.encyclo.co.uk/local/20974

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.
Found on
https://www.infoplease.com/dictionary/swiftlet
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