Reptiles
Plain-Bellied Water Snake
Nerodia erythrogaster · also called plain-bellied water snakes, yellow-bellied water snake
A plain-bellied water snake moves overland between two wetland pools, a journey more ambitious than many of its water snake relatives typically attempt. Flip it over, and a plain, unmarked belly immediately confirms which of several similar-looking Nerodia species this actually is.
Overview
The plain-bellied water snake, Nerodia erythrogaster, is a widespread, non-venomous snake native to a broad range of wetland habitat across the central and southeastern United States. Its unmarked belly and unusually broad habitat tolerance help distinguish it from several more habitat-specific water snake relatives.
A generalist among habitat specialists
While several water snake relatives specialise in specific river or lake conditions, the plain-bellied water snake tolerates a genuinely wide range of wetland types, a flexibility reflected in both its broad range and its willingness to travel overland when conditions call for it.
Status
Least Concern — widespread and stable across a broad range of wetland habitat throughout the central and southeastern United States.
Plain-Bellied Water Snake: common questions
How can you tell a plain-bellied water snake from other water snakes?
A plain-bellied water snake displays a solid, unmarked belly colouration, typically yellow, orange, or plain grey, a feature that immediately distinguishes it from several other Nerodia water snake species with more heavily patterned or blotched undersides, making the belly one of the most reliable identification features.
Why does the plain-bellied water snake travel overland so much?
A plain-bellied water snake is known to travel considerable distances overland between water bodies, a behaviour more pronounced than in some other water snake species, likely reflecting the species' broad tolerance for varied wetland habitat types and its willingness to relocate when conditions at one water source become less favourable.
Is the plain-bellied water snake dangerous?
No, despite displaying defensive behaviour such as flattening its body and striking when cornered, a plain-bellied water snake possesses no venom and poses no serious threat to humans, relying on this bluff display rather than any actual dangerous capability to deter potential threats.
Where does the plain-bellied water snake live?
The plain-bellied water snake is native to a broad range of wetland habitat across the central and southeastern United States, tolerating rivers, lakes, swamps, ponds, and even temporary pools more readily than several of its more habitat-specific water snake relatives.