The Western Cottonmouth, also known as Agkistrodon piscivorus, is a venomous snake found primarily in the southeastern United States. It typically inhabits wetlands, swamps, and riverbanks, where it preys on fish, amphibians, and small mammals. This snake is recognizable by its thick body, triangular head, and distinctive dark coloration, which can vary from brown to black. Western Cottonmouths are known for their defensive behavior, often displaying a characteristic open-mouth threat when threatened. They are semi-aquatic and are excellent swimmers, using their flattened tails to propel themselves through the water. Despite their venomous nature, they generally avoid human contact and will retreat if given the chance.