The term "water snake" generally refers to several species of non-venomous snakes that are commonly found in or near aquatic environments. These snakes are adept swimmers and often inhabit rivers, lakes, and marshes. They primarily feed on fish, amphibians, and small invertebrates, using their agility in the water to catch prey. One well-known example of a water snake is the Northern Water Snake, which is native to North America. These snakes can vary in color and pattern, but they typically have a robust body and a flattened head. Unlike some other snakes, water snakes are not aggressive and will usually retreat when threatened.