a white, medium-sized, migratory egret (Egretta thula) with black legs and yellow feet, usually living in colonies in marshland ranging from the U.S. to Chile and Argentina
See snowy egret in American Heritage Dictionary 4
noun
A medium-sized egret (Egretta thula) with white plumage, black legs, and yellow feet, found in warm parts of the Western Hemisphere. It was once widely hunted for its white, lacelike aigrettes that grow during the breeding season.