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

This is the ultimate identification guide to the nightjars, potoos, frogmouths, Oilbird, and owlet-nightjars of the world. Covering all 135 known species of these elusive and cryptically plumaged birds, this illustrated guide features more than 580 superb color photographs depicting every species and many subspecies, including numerous images never before published. Photos of museum specimens are ...