Hormones and Reproduction of Vertebrates, Volume Four: Birds is the fourth of five second-edition volumes representing a comprehensive and integrated overview of hormones and reproduction in fishes, amphibians, reptiles, birds, and mammals. The book includes coverage of endocrinology, neuroendocrinology, physiology, behavior, and anatomy of reptilian reproduction. It provides a broad treatment of the roles of pituitary, thyroid, adrenal, and gonadal hormones in all aspects of reproduction, as well as descriptions of major life history events. New to this edition is a concluding assessment of the effect of environmental influences on birds. Initial chapters in this book broadly examine sex determination, reproductive neuroendocrinology, stress, and hormonal regulation as it relates to male and female reproductive structure and function. Subsequent chapters examine hormones and reproduction of specific behaviors, including courtship, mating, parental care, and migration. The book concludes with an examination of endocrine disruption of reproduction in birds.