Northern Water Snake
(Nerodia sipedon sipedon)
| Photos by Mike Marchand |
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| Northern water snake resting on edge
of dirt trail. Notice banded patterns and round pupils (rattlesnakes
have vertical pupils). |
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Northern water snake |
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Colorful belly pattern of a northern
water snake. |
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Young dark northern water snake. (Photo
by Alan Briere) |
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Newborn northern water snake |
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| A dark northern water snake basking on dock. Sometimes the banding pattern is difficult to see in dark snakes. |
NH Conservation Status: Not listed
State Rank Status: Widespread and secure
Distribution: Throughout NH except far north
Description: A dark, heavily blotched snake measuring 24-42 inches. Has a brown or grayish base color with numerous brown or black blotches or bands. The belly has black or red half-moon shapes that vary in pattern and arrangement.
Commonly Confused Species: Timber rattlesnake, milk snake; water moccasin or cottonmouth (not a NH species)
Habitat: Found in aquatic and semi-aquatic habitats such as streams, ponds, swamps, and marshes. Often uses logs or branches overhanging the water for basking. Rarely found far from water.
Life History: From August to October gives birth to 20-40 live young. During winter hibernates underwater or in holes near water.
Conservation Threats: Loss and degradation of wetland habitats; anything that results in reduced amphibian populations.
Distribution map: Click here for a map showing the towns where this species is reported to occur in NH
