Trogons And Quetzals Of The World Author:JOHNSGARD PAUL A, Paul A. Johnsgard Beautifully illustrated with color plates and line drawings, this comprehensive review of trogons and quetzals -- the first to be published in more than 150 years -- covers all thirty-nine extant species. This up-to-date survey will serve as a valuable reference for ornithologists, conservationists, aviculturalists, and birdwatchers worldwide.