any of a family (Otididae) of large, heavy, long-legged
gruiform birds of Europe, Asia, and Africa
Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by
Houghton Mifflin Harcourt. All rights reserved.
Word origin of 'bustard'ME < OFr bistarde (< OIt bistarda) & ostarde, both < L avis tarda, lit., slow bird, prob. folk etym. for name of Iberian orig.