The perspective that a primatologist brings to an understanding of behavior is presented within an introductory framework. This well-known work establishes a comparative attitude, provides anecdotal examples of a primatologist at work, and stresses the importance of good research design and quantitative techniques. Anecdotal examples of primatologists at work are chosen to illustrate a field study (spider and howler monkeys) and experiences with a laboratory colony (snow monkeys in Texas). These discussions are designed to sensitize readers to the adventure, complexity, and some of the mechanics of actually doing primatology. The entire primate order is examined, and reader accessibility is enhanced by abundant photographs, illustrations, and an in-depth glossary.