The biology of many of the venomous reptiles of North America is still poorly known. It is the primary purpose of this book to provide a synthesis of what is known of the natural history of each venomous lizard, elapid snake, and pitviper within the United States, Canada, and northern Mexico. second major purpose of the book is to present a detailed overview of what constitutes reptile venoms, and the effects, treatment, and prevention of bites by these animals. The amount and scope of the literature concerning these topics, especially on venomous snakes, have increased tremendously since 1992.