Collared Lizards and Leopard Lizards are one of the most fascinating and popular lizard groups endemic to North America. Retired veterinarian Barney Oldfield expertly and successfully navigates the reader through all aspects of their biology. Importantly, this richly illustrated book provides the reader with up-to-date literature. No other book explores this family of lizards with such enthusiasm, passion, and knowledge. A must volume to acquire for all who share this love for crotaphytid lizards.