“Birds have evolved over millions of years, and all sizes, shapes, colors, and patterns exist nearly everywhere in the world today. This encyclopedia, designed to introduce birds in all their varieties, contributes to and encourages student research.

Nearly 140 encyclopedic articles are arranged alphabetically over volumes 1 through 10. Articles are color coded by thematic category: “General Topics” (Anatomy, Flight, Songs); “Orders and Families” (Birds of prey, Owls, Penguins); and “Single Species” (Bald eagle, Barn owl, Wild turkey). Each “Orders and Families” and “Single Species” article contains discussion of topics such as breeding, defense, and habitat. All entries include a distribution map and key-facts box (noting order, family, habitat or range, size, conservation status, etc.). “Single Species” maps focus on distribution in North America, with breeding, wintering, and migration ranges. Many entries feature color-coded boxes with more detailed information on topics such as “Adaptation and Diversity,” “Birds and Humans,” or “Structure and Function.” Some entries also include “Let's Investigate” boxes, which suggest ways for students to carry out their own observations of birds.

Articles range in length from two to eight pages and include numerous full-color photographs, diagrams, and maps. Every entry ends with a see also box, directing students to other articles within the set. Each volume concludes with a volume-specific glossary and index. Volume 11 contains a comprehensive set glossary and index; resources for further study (books, magazines, journals, Web sites, and places to go); and three thematic indexes: “Index of Species Names,” “Index of Behaviors,” and “Index of Endangered Species.”

Although there are numerous bird encyclopedia sets in print, this reference for students and browsers alike deserves full consideration. Clear and concise information is provided in an appealing layout most appropriate for upper-elementary through middle-school users. Public libraries and schools where the study of birds is a curriculum topic will find this reference highly valuable.”