Dr. Jenkins sits down with Dr. Andrew Holycross to discuss one of the rarest rattlesnakes in the United States. They start by talking about the species' distribution, which is primarily in Mexico, and focus on the two subspecies found in the United States: the Arizona and New Mexico Ridge-nosed Rattlesnakes. The beginning of the podcast covers the natural history and ecology of the species, including movement, habitat use, genetics, and diet. They then discuss the various threats that have led to the New Mexican subspecies becoming endangered and declines in the other subspecies. Finally, they talk about the future of these Sky Island Rattlesnakes in the face of climate change, including management techniques such as genetic augmentation and assisted migration.