Common Watersnake
Nerodia sipedon • Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Natricinae, Genus: Nerodia, Species: Nerodia sipedon
Native to North America, primarily ranging throughout the eastern and central United States as well as parts of southeastern Canada, inhabiting regions from Maine down to the Carolinas and west to Colorado.
Look up Common Watersnake in the Snake Encyclopedia →Family
Order: Squamata, Suborder: Serpentes, Family: Colubridae, Subfamily: Natricinae, Genus: Nerodia, Species: Nerodia sipedon
Conservation
Listed as Least Concern on the IUCN Red List, facing localized threats primarily from habitat loss, pollution of aquatic ecosystems, and human persecution.
Physical Description
Displays a brownish or grayish body background overlaid with darker crossbands on the neck region that transition into alternating dorsal and lateral blotches further down the body. The head is distinct from the neck, and scales are heavily keeled, giving a textured appearance.
Size & Dimensions
The pictured specimen appears to be a subadult around 45 to 60 cm in length. Adults typically range from 75 to 135 cm in total length, with females generally growing larger than males.
Habitat
Found primarily in or near freshwater environments such as streams, rivers, lakes, ponds, swamps, marshes, and temporary pools, typically at elevations from sea level up to around 1,000 meters, utilizing logs, rocks, and shoreline vegetation for basking and cover.
Diet & Feeding
Diet consists primarily of fish, amphibians, crayfish, and occasional small mammals or reptiles. They are active foragers that hunt both day and night, capturing prey directly in the water or along the margins.
Reproduction
Viviparous species that gives birth to live young rather than laying eggs. Mating typically occurs in the spring, and females give birth to litters averaging 20 to 30 young in late summer or early autumn.
Look-alikes
Frequently confused with various species of venomous pit vipers due to its dark patterning and defensive posturing, but lacks heat-sensing facial pits and vertical pupils, and features a different scale texture and head shape.
Conservation Status
Listed as Least Concern on the IUCN Red List, facing localized threats primarily from habitat loss, pollution of aquatic ecosystems, and human persecution.
Cultural Significance
Plays an important ecological role in controlling amphibian and fish populations in aquatic and riparian food webs, though frequently misunderstood and killed due to mistaken identity.
Notable Features
Known for emitting a strong-smelling musk and striking repeatedly when cornered or handled, alongside specialized keeled scales that aid in gripping slippery aquatic prey and wet substrates.