Pit vipers are a group of venomous snakes belonging to the family Viperidae. They are known for their distinctive heat-sensing pits located between their eyes and nostrils, which help them detect warm-blooded prey. Common species include the Eastern Diamondback Rattlesnake and the Copperhead. Pit vipers are found primarily in the Americas and are characterized by their triangular heads and long, retractable fangs. These snakes are typically ambush predators, relying on camouflage to blend into their surroundings. They primarily feed on small mammals, birds, and amphibians. Pit vipers are also known for their potent venom, which they use to immobilize prey and aid in digestion.