Dictionary.com
Thesaurus.com

kingbird

American  
[king-burd] / ˈkɪŋˌbɜrd /

noun

  1. any of several American tyrant flycatchers of the genus Tyrannus, especially T. tyrannus eastern kingbird, of North America, known for their pugnacious disposition toward predators.


kingbird British  
/ ˈkɪŋˌbɜːd /

noun

  1. any of several large American flycatchers of the genus Tyrannus, esp T. tyrannus ( eastern kingbird or bee martin )

"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

Etymology

Origin of kingbird

An Americanism dating back to 1770–80; king + bird