This is the first systematic owl checklist for over 50 years to include subspecies and synonyms. The book provides information on the type, locality, habitat and distribution of 220 owl species and 539 taxa, as well as the location of museum collections of skins and mounted specimens, and references to owl illustrations. In addition to scientific names, the common names of each species in English, German, French and Spanish are listed. The checklist is complemented by many beautiful owl drawings and by watercolours illustrating owl species that have been newly described or rediscovered within the last 20 years.