Northern water snake Nerodia sipedon
Identification: The northen water snake is, on average, between 24 and 42 inches long. They have a brown or gray base color, with brown or black blotches around the top of their body, and black or red half-moon patterns along the belly. They have round pupils. This snake has colorful belly patterns.
Habitat: This snake is found in aquatic and semi-aquatic habitats. They use logs or branches nea the water for basking. They prefer slow-moving or standing water.
Other: The northern water snake is commonly confused for water moccasin or cottonmouth, which is not found in NH. Although when agitated, they may bite, this snake is not venomous and is essentially harmless.