The rattlesnake is a type of venomous snake found primarily in the Americas. It is easily recognized by the distinctive rattle at the end of its tail, which it uses as a warning signal to potential threats. Rattlesnakes belong to the Crotalinae subfamily and are known for their heat-sensing pits, allowing them to detect warm-blooded prey even in the dark. There are several species of rattlesnakes, including the Western Diamondback and the Eastern Timber Rattlesnake. They typically inhabit a variety of environments, such as deserts, forests, and grasslands. Rattlesnakes play an important role in their ecosystems by controlling rodent populations and serving as prey for larger animals.