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Any of several tiny birds of the genus Polioptila, found throughout the Americas and having a long tail and a slender bill.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Animals) any of various small American songbirds of the genus Polioptila and related genera, typically having a long tail and a pale bluish-grey plumage: family Muscicapidae (Old World flycatchers, etc)
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
any of various small, insect-eating New World songbirds of the genus Polioptila (subfamily Silviinae), having a long, mobile tail.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.