Grade 6 Up-This vibrant revision treats readers to an informative, exhaustive, and intimate examination of the habits, behaviors, and lifestyle of "species from every branch of the animal world, every region of earth's landmasses and all oceans." Approximately 1200 accessible and well-researched single to multipage entries, arranged in alphabetical order by creatures' common name, lucidly and accurately discuss the anatomy, size, diet, habitat, breeding habits, and distinctive features of a diversity of animals. Each updated article also includes useful data boxes that offer information about each animal-scientific classification, length, weight, status, etc. Fifteen new articles on the world's major biomes and habitats describe their climate, outstanding physical characteristics, native plant and animal life, conservation issues, and worldwide distribution. Thirty-plus "guidepost entries" offer supplementary material about selected groups of related animals-apes, deer, whales, to name a few. The wealth of new illustrative matter, consisting of beautifully composed color photographs, is instructive and relevant. Color maps, another addition to the edition, depict the population and range of the species. The index volume lists species by common name, scientific name, and geographic region.