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least bittern
The least bittern (''Ixobrychus exilis'') is a small heron, the smallest member of the family Ardeidae found in the Americas.
==Description==
The least bittern is one of the smallest herons in the world, with perhaps only the dwarf bittern and the black-backed bittern averaging smaller in length.〔
〕 This tiny bittern can measure from in length, and the wingspan ranges from . Body mass is from , with most birds between , making this perhaps the lightest of all herons. Yet, a recent manual of avian body masses, cites yet another species in this genus, the stripe-backed bittern, has having a mean body mass slightly lower than the least bittern, which is credited with a mean mass of .〔''CRC Handbook of Avian Body Masses, 2nd Edition'' by John B. Dunning Jr. (Editor). CRC Press (2008), ISBN 978-1-4200-6444-5.〕 This bird's underparts and throat are white with light brown streaks. Its face and the sides of the neck are light brown; it has yellow eyes and a yellow bill. The adult male is glossy greenish black on the back and crown; the adult female is glossy brown on these parts. They show light brown parts on the wings in flight.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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