Grzimek’s Student Animal Life Resource: Insects and Spiders offers readers comprehensive and easy-to-use information on Earth’s insects and spiders. Entries are arranged by taxonomy, the science through which living things are classified into related groups.

Grzimek’s Student Animal Life Resource: Insects and Spiders 4 Volumes

Each entry includes sections on physical characteristics; geographic range; habitat; diet; behavior and reproduction; animals and people; and conservation status. All entries are followed by one or more species accounts with the same information as well as a range map and photo or illustration for each species. Entries conclude with a list of books, periodicals, and Web sites that may be used for further research.

Each volume of Grzimek’s Student Animal Life Resource: Mammals includes a pronunciation guide for scientific names, a glossary, an overview of Mammals, a list of species in the set by biome, a list of species by geographic location, and an index. The set has 540 full-color maps, photos, and illustrations to enliven the text, and sidebars provide additional facts and related information.

The classification of animals into orders, families, and even species is not a completed exercise. As researchers learn more about animals and their relationships, classifications may change. In some cases, researchers do not agree on how or whether to make a change. For this reason, the heading “Number of species” in the introduction of an entry may read “About 36 species” or “34 to 37 species.” It is not a question of whether some animals exist or not, but a question of how they are classified. Some researchers are more likely to “lump” animals into the same species classification, while others may “split” animals into separate species.

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