WHAT IS A BIRD?

A survey of birds' characteristics—those that make them unique and those they have in common with other animals. Incorporating clear color photos from Oxford Scientific Films and also diagrams (e.g., to explain avian aeronautics) and color drawings (to depict the variety of beak shapes) into his lucid presentation, Snedden discusses feathers, flying, songs and calls, and eggs, enlivening the typical with the unusual and making instructive comparisons between bird species and between birds and other animals. Sizes and habitats are mentioned only when they are germane to the subject at hand: the concept of ``bird,'' for instance, in the context of the animal kingdom. A glossary extends information found in the text. Snedden's companion book, What Is an Insect? (87156-540-4), is also available. An excellent concept builder. Index. (Nonfiction. 7- 10)