Zoology is the scientific study of animals, including their behavior, physiology, anatomy, evolution, classification, and distribution. It is a broad field that encompasses many sub-disciplines such as ethology, which focuses on animal behavior, and herpetology, which focuses on the study of reptiles and amphibians. Zoologists may work in a variety of settings, including zoos, aquariums, research laboratories, and universities. They often use a variety of tools and techniques to observe and analyze animal behavior, such as field studies, laboratory experiments, and computer simulations.