Amazon.com description: Product Description: Provides all the information needed to identify any species at any time of the year, with detailed text on size, habitat, range, identification and voice. Accompanying every species entry is a distribution map and numerous illustrations to show the species in all the major plumages (male, female, immature, in flight, at rest, feeding, etc). Each group of birds has an introduction, which covers the major problems involved in identifying or seeing them, including: how to organize a sea watching trip; how to separate birds of prey in flight; and which duck hybrids can be confused with which species.