Head to head
Concho Water Snake vs Brazos Water Snake
A Concho water snake and a Brazos water snake are close relatives, each restricted naturally to a single central Texas river system and nowhere else on Earth, yet their conservation stories have taken noticeably different paths.
| Concho Water Snake | Brazos Water Snake | |
|---|---|---|
| Scientific name | Nerodia paucimaculata | Nerodia harteri |
| Range | Concho and Colorado Rivers, west-central Texas | Brazos River system, central Texas |
| Federal listing history | Threatened, delisted in 2011 | No comparable federal delisting history |
| Habitat preference | Rocky, flowing riffles | Rocky, flowing riffles |
| Diet | Small fish | Small fish |
| Main threat | Dam construction, altered river flow | Dam construction, altered river flow |
| Body size | Small, slender | Small, slender |
| Conservation status | Least Concern (post-delisting) | Least Concern |
Concho Water Snake vs Brazos Water Snake: common questions
Do the Concho water snake and Brazos water snake live in the same river?
No, each species is confined to its own separate central Texas river system, the Concho water snake to the Concho and Colorado Rivers and the Brazos water snake to the Brazos River, meaning the two closely related snakes do not naturally overlap in range at all.
Why was the Concho water snake delisted from federal protection?
The Concho water snake was federally listed as Threatened before being delisted in 2011 following documented population recovery tied to changes in how nearby reservoirs manage water flow, a genuine conservation success that the Brazos water snake has not carried an identical formal listing history to match.
What habitat do both of these water snakes prefer?
Both the Concho water snake and the Brazos water snake show a strong preference for rocky, fast-flowing riffles over the still ponds and slow backwaters that many other North American water snakes favour, a shared habitat requirement that also makes both species vulnerable to dam-driven changes in river flow.