This book explores the science and practice of ornithology, detailing the history, techniques, and classification of birds worldwide. Authored by James Fisher and featuring the renowned illustrations of Roger Tory Peterson, the work is structured into four main sections. It begins with an outline of ornithology as a science, followed by a discussion of bird watching techniques and tools. The subsequent section provides a comprehensive classification and distribution map of bird families, genera, and species, including extinct and endangered ones. The book concludes with an essay on the relationship between birds and humans, emphasizing conservation issues.

This comprehensive work is regarded as a significant contribution to ornithological literature, praised for its detailed classification and the inclusion of Roger Tory Peterson's exceptional illustrations. The book's unique maps detailing bird family distribution are highlighted as a key feature, offering valuable insights for researchers and enthusiasts alike. Its exploration of conservation issues and the relationship between birds and humanity provides a crucial perspective on environmental stewardship. The inclusion of lists of extinct and endangered species underscores the urgency of conservation efforts.