Definition of organ bird in US English:

organ bird

noun

  • 1Either of two Australian birds of the family Cracticidae, the pied butcher-bird, Cracticus nigrogularis, and the Australian magpie, Gymnorhina tibicen.

  • 2A reddish-orange and brown wren of Central and South America, Cyphorhinus aradus.

Origin

Mid 19th century; earliest use found in John Gould (1804–1881), ornithologist and publisher.