identification

A guide to the wildlife of Africa, covering 850 species and the continent's different geographical regions.

Features information and photographs of 300 species of cacti.

Contains color illustrations and descriptions of over seven hundred wildflowers, providing information about the textures, shapes, colors, and other characteristics of each species; grouped by botanical family; and includes range maps.

Presents information on how to create a garden that will attract butterflies and provide for their continuing needs; discusses the basics of butterfly lives; provides an identification guide to common backyard species in North America; and includes details on the life and behavior of each species.

An identification guide to over five hundred medicinal plants, with information on the known uses of each plant, line drawings, and color photographs. Includes an index to medical topics.

Describes how scientists are conducting the search for genes that influence susceptibility to manic-depressive illness by taking DNA samples from relatives who suffer from the disorder, and discusses the implications of their findings for other mental illnesses such as autism, Tourette's syndrome, and schizophrenia.

Illustrations of terms used in plant identification keys and descriptions.

An introduction to insect diversity and natural history, providing basic information about all major insect families, with a focus on the common families of northeastern North American insects, and including charts and illustrations, and over four thousand color photographs.