Diamondback Water Snake
Nerodia rhombifer
A large, heavy-bodied water snake with a distinctive dark, diamond-shaped netlike pattern on an olive-brown background.
- Adult length
- 0.75-1.5 m (2.5-5 ft)
- Range
- South-central United States
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Overview
The Diamondback Water Snake is one of the largest of the North American water snakes, found throughout river systems and wetlands of the south-central United States. Its bold, net-like diamond pattern distinguishes it from other Nerodia species.
It is a strong swimmer well adapted to life in and around large rivers, lakes, and reservoirs.
How to identify it
- Large, heavy body, olive-brown to yellowish-brown in color
- Dark, diamond- or chain-like netted pattern down the back
- Keeled scales giving a rough texture
- Round pupils
- Distinguished from other water snakes by its larger size and distinctive diamond netting pattern
Habitat & range
Found in large rivers, lakes, reservoirs, sloughs, and swamps throughout the south-central United States, especially the Mississippi and Rio Grande drainages.
Behavior, diet & reproduction
Primarily nocturnal to crepuscular, often seen basking on branches overhanging water during the day. Feeds heavily on fish and amphibians. Bears live young.
Frequently asked questions
How large does it get?
It is one of the largest North American water snakes, with adults commonly exceeding 1 m (3.3 ft).
What is its distinguishing pattern?
A dark, diamond- or chain-like netted pattern on an olive-brown background.
Diamondback Water Snake guides
In-depth guides for identifying and understanding Diamondback Water Snake.
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