how to identify a water moccasin?

TLDR: The water moccasin, or cottonmouth, is a venomous snake identifiable by its thick body, triangular head, and distinctive threat display. It inhabits freshwater environments in the southeastern U.S. and can be distinguished from non-venomous water snakes by its head shape, heat-sensing pits, and defensive behavior.

The water moccasin (Agkistrodon piscivorus) is a venomous snake found primarily in the southeastern United States, known for its heavy, thick body and triangular head with a heat-sensing pit. Its coloration can range from black to brown or tan, often featuring dark crossbands that may fade with age. Juvenile moccasins have bright tail tips to attract prey, which diminish as they mature. They thrive in freshwater habitats like swamps and marshes, often basking near water.

To distinguish water moccasins from non-venomous water snakes, look for their wedge-shaped head, thicker body, and the presence of heat-sensing pits. Unlike water snakes, which typically flee when threatened, water moccasins display a defensive posture by gaping their mouths and vibrating their tails. While they have a fearsome reputation, they are not aggressive unless provoked and play a vital role in their ecosystems.