Webster’s New World College Dictionary, Fourth Edition, compiled by the
editors of Webster’s New World Dictionaries. Copyright © 2010 by Houghton
Mifflin Harcourt. Published by Houghton Mifflin Harcourt. All rights reserved.
Word origin of 'widowbird'calque of Port viuva, widowbird, lit., widow (< L vidua: see widow): from the resemblance of its dark plumage to a widow's mourning clothes