Animal psychology is the study of animal behavior, cognition and emotions. It is a multi-disciplinary field that draws upon knowledge from fields such as biology, neurology, and psychology. Synonyms for animal psychology include animal behavior, ethology, comparative psychology, and behavioral ecology. All these terms are closely related to the study of animal behavior and are used interchangeably in different contexts. Ethology refers to the scientific study of animal behavior, while comparative psychology is the scientific study of the behavior of different animal species. Behavioral ecology is the study of the interplay between an animal's behavior and its environment. Whatever term is used, the goal of studying animal psychology is to better understand how animals think, feel and behave.