Crotalus (rattlesnake)

Crotalus, commonly known as rattlesnakes, is a genus of venomous snakes found primarily in the Americas. They are easily recognized by the unique rattle at the end of their tails, which they use as a warning signal when threatened. Rattlesnakes are pit vipers, meaning they have heat-sensing pits that help them detect warm-blooded prey, such as rodents and birds. Their venom, used to subdue prey, can be dangerous to humans, although bites are often treatable with medical attention. These snakes are important for their ecological role in controlling rodent populations.