The study of animals is known as zoology. Zoology covers a wide variety of more specific disciplines, all of which are based on the scientific method. Zoology helps people understand not only animals, but ecosystems, evolution and the environment at large.
Zoology is comprised of numerous categories, known as sub-disciplines. For instance, primatology is the study of primates, entomology is the study of insects, ichthyology is the study of fish and ornithology is the study of birds. In addition to differentiation by species, zoology also encompasses other types of research, such as animal physiology, behavioral ecology, evolutionary biology and ethology, the study of animal behavior.