This best-selling dictionary is the most comprehensive and up-to-date of its kind, containing over 5,250 entries on all aspects of zoology. Complemented with numerous illustrations, it includes terms from the areas of ecology, animal behaviour, evolution, earth history, zoogeography, genetics, and physiology and it provides full taxonomic coverage of arthropods, other invertebrates, fish, reptiles, amphibians, birds, and mammals.