Nightjars and Their Allies provides a detailed review of the biology and evolution of all Caprimulgiformes. 118 species accounts provide details of coloration, measurements, geographical variation, range, movements, habitats, food and feeding, behaviour, voice, breeding, field identification, conservation, etc., with a large bibliography. All species are illustrated on the 23 colour plates by Martin Woodcock and there are numerous line drawings. The introductory chapters trace the evolution of each group within the Caprimulgiformes. Their taxonomy, biogeography and adaptive radiation in habitat preferences, feeding, behaviour, vocalisations, breeding, and moult are then reviewed in an evolutionary context.