Agkistrodon is a genus of venomous snakes commonly known as pit vipers. They are primarily found in North America and are characterized by their distinctive triangular heads and heat-sensing pits located between their eyes and nostrils. This adaptation helps them detect warm-blooded prey, such as rodents. There are several species within the Agkistrodon genus, including the cottonmouth and copperhead. These snakes typically inhabit wetlands, forests, and rocky areas. While their venom can be dangerous to humans, they generally prefer to avoid confrontation and will often retreat when threatened.