ruddy duck definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a small, North American duck (Oxyura jamaicensis), the breeding male of which has a brownish-red neck and upper body, black crown, white cheeks, and blue bill
ruddy duck definition by American Heritage Dictionary
A North American duck (Oxyura jamaicensis) having stiff pointed tail feathers and, in the male, brownish-red upper plumage and a black-and-white head. Also called sprigtail.