american egret: a common egret of the genus Egretta found in America; it is a variety of the Old World white egret Casmerodius albus
egret: any of various usually white herons having long plumes during breeding season
mononychus olecranus: a turkey-sized long-legged fossil 75 million years old found in the Gobi Desert having bird-like fused wrist bones and keeled breastbone and a long tail resembling a dinosaur's; short forelimbs end in a single claw instead of wings; classification as bird or dinosaur is in dispute