Dictionary.com
Thesaurus.com

sun bittern

American  

noun

  1. a graceful South American wading bird, Eurypyga helias, related to the cranes and rails, having variegated plumage.


sun bittern British  

noun

  1. a cranelike bird, Eurypyga helias, of tropical American forests, having a greyish plumage with orange and brown wings: family Eurypygidae, order Gruiformes (cranes, rails, etc)

"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 sun bittern

First recorded in 1865–70