Herpetologists' subjects are animals that belong to the class of reptiles and amphibians, commonly referred to as ASPS. This includes snakes, lizards, turtles, frogs, salamanders, and caecilians. Herpetology is the study of these animals, and herpetologists are scientists who specialize in this field. They study the behavior, ecology, physiology, and evolution of these animals, as well as their interactions with humans and other species.