Nightjars, Potoos, Frogmouths, Oilbird, and Owlet-Nightjars of the World

"Cleere has synthesized a lot of information about a group of birds that are difficult to identify and study, and presents it in an easy-to-use format. He has done a tremendous job of collecting numerous photos of these enigmatic birds that show many helpful identification characteristics and also their subtle beauty."--Sophie Webb, coauthor of "A Guide to the Birds of Mexico and Northern Central America"