The dorsal pattern ranges from a tan or brown to gray background, typically overlain by a variable pattern of black, dark brown, or reddish brown crossbands and blotches. They are fairly dark-colored snakes and may be brown, tan or grayish. Description: Northern watersnakes range in size from 24 to 55 in (61-140 cm). The belly is patterned with light half moons on a darker background.

of Wildlife and Fisheries). edit subscriptions. range from 5.3 ±1.2 [4-6, n = 3] in the Ridge and Valley north of the New River to 8.7 ± 4.5 [2-32, n = 30] in the northern Piedmont), except the Appalachian Plateau (ave. = 13.7 ± 4.0, 10-18, n = 4). Northern Watersnake (Nerodia sipedon) Photos by J.D.

"Nerodia sipedon" (On-line), Animal Diversity Web. Northern Water Snakes are found in much of the eastern half of the United States. There are two principal subspecies: Nerodia sipedon sipedon and Nerodia sipedon pleuralis. Nerodia sipedon: information (1) Nerodia sipedon: pictures (16) To cite this page: Gillilland, M. 2013.

Range maps in the books are off if I remember right. It is being provided to meet the need for timely best science. The two subspecies of the Common Watersnake are teh the Midland Watersnake (N. s. pleuralis) and the Northern Watersnake (N. s. sipedon); these two look very similar, except that the dark bands (usually fewer than 30) on the Midland Watersnake's back are narrower than the lighter spaces between them, while the dark bands of the Northern Watersnake are wider than the light ones. This species is found in much of the lower Mississippi River valley and parts of the coastline adjacent to the Mississippi River delta. Nerodia watersnakes may puff up or flatten out defensively and bite. Nerodia sipedon sipedon is commonly called the Northern Water Snake and Nerodia sipedon pleuralis is called the Midland Water Snake. Last edited on 23 January 2019, at 17:18. They are commonly encountered fish eating snakes across much of eastern North America. Many are killed by people who mistake them for cottonmouths (even hundreds of miles north of the range of cottonmouths) or copperheads. Common Watersnakes Nerodia sipedon are medium (record 150 cm) natricine snakes with keeled scales often found near water in large numbers. The range of Nerodia cyclopion is restricted to the United States. English: Range map of subspecies of Common watersnake (Nerodia sipedon). Nerodia sipedon in the southeastern region had a higher average number of complete body crossbands (12.1 ± 6.4, 2-34, n = 55) than in other regions in the state (aves. Distribution Notes: Statewide, with sipedon in the northern third of the state, pleuralis in the southern fifth and intergrades in a broad band across the center.

N. s. sipedon - (Northern watersnake) N. s. insularum - (Lake Erie watersnake)

Nerodia sipedon pleuralis H.M. Smith & Brodie, 1982; Geographic range. 512.) Willson unless otherwise noted . Does anyone have an updated range map on them? The coloration is much more vivid in young and wet specimens.

Native Range: Alaska: Hawaii: Puerto Rico & Virgin Islands: Guam Saipan: Hydrologic Unit Codes (HUCs) Explained Interactive maps: Point Distribution Maps.

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