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nightjar

[nahyt-jahr] /ˈnaɪtˌdʒɑr/
noun
1.
a nocturnal European bird, Caprimulgus europaeus, of the family Caprimulgidae, having a short bill and a wide mouth and feeding on insects captured in the air.
2.
Also called goatsucker. any other nocturnal or crepuscular bird of the family Caprimulgidae.
Origin
1620-1630
1620-30; night + jar2 (from its harsh cry)
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for night jar

nightjar

/ˈnaɪtˌdʒɑː/
noun
1.
any nocturnal bird of the family Caprimulgidae, esp Caprimulgus europaeus (European nightjar): order Caprimulgiformes. They have a cryptic plumage and large eyes and feed on insects
Word Origin
C17: night + jar², so called from its discordant cry
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for night jar

nightjar

n.

nocturnal bird, goatsucker, 1620s, from night + jar (v.). So called for the "jarring" sounds made by the male when the female is brooding, which have been described as a "churring trill that seems to change direction as it rises and falls." An Old English word for it was nihthræfn "night raven."

Online Etymology Dictionary, © 2010 Douglas Harper
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9
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