Genus Crotalus is a diverse group of venomous snakes found throughout the Americas. Commonly known as "rattlesnakes," they are characterized by their distinctive rattle located at the tip of their tails. There are currently about 32 recognized species in the genus Crotalus, each with its own unique characteristics. Some synonyms for the genus Crotalus include the pit vipers, rattlesnakes, massasaugas, and lanceheads. These synonyms highlight the distinctive traits of these snakes, from their ability to sense heat with specialized pits to their long, slender heads adapted for ambush predation. Regardless of the name used, these snakes possess a potent venom that makes them formidable predators in their respective ecosystems.