A comprehensive, up-to-date compilation of scientific information covering the whole of the field of natural history of the wildlife of the world. The editors of the individual sections (Mammals, Amphibians and Reptiles, Fishes, Birds, Insects and Invertebrates) are scientists associated with the American Museum of Natural History and the New York Zoological Society. All seven men have done extensive field work and studied their subjects in their various backgrounds. The data they have accumulated is not only factual, but there are bits of shared adventure, the marvels of natural history, what animals mean to man, and some of the fascinating bits of fact and lore that help us to understand how the creatures live, their habits, and so on. The text is concise, accurate without sounding too scientific, popular in approach.