This course surveys the rapidly evolving law concerning nonhuman animals. Pressing legal questions arise concerning all types of animals, from insects to cetaceans, in contexts ranging from companion animals at home, to factory farms, to zoos and aquariums, to research facilities, to the wild. What is the legal status and standing of animals? What legal duties pertain to their treatment and to other actions that bear upon animals? What legal recognition is afforded to the ways that humans live alongside animals? In answering these questions, animal law intersects with many traditional areas such as property, tort, criminal, regulatory, constitutional, and international law. Animal law fundamentally concerns the practical application of statutory, decisional, and treaty law, and this course is thus primarily doctrinal. But animal law inevitably also raises deep theoretical and ethical questions about the nature of legal rights and interests, the construction of a political community, and the ways that the law responds or fails to respond to vulnerability, power imbalances, and biodegradation.