Colubridae
Rhadinaea nuchalis
HarmlessThis species has no widely used English common name.

Rhadinaea nuchalis is a non-venomous snake in the Colubridae family, recorded in 1 country.
- Family
- Colubridae
About the Rhadinaea nuchalis
Rhadinaea nuchalis is a species of snake in the family Colubridae. It was formally described in 2020 and is named after the large nuchal blotches on its neck. A Mexican endemic, it is known only at intermediate elevations from the vicinity of El Molote in the western portion of the Sierra Madre del Sur of Guerrero.
Adapted from Wikipedia, available under CC BY-SA.
Frequently asked: Rhadinaea nuchalis
- Is the Rhadinaea nuchalis venomous?
- No. The Rhadinaea nuchalis is non-venomous and is not considered dangerous to humans. Like most snakes, it will retreat rather than bite when given the chance.
- Is the Rhadinaea nuchalis poisonous?
- Snakes are venomous, not poisonous. "Poisonous" means harmful to eat or touch; "venomous" means injecting toxins through a bite. The Rhadinaea nuchalis is neither poisonous nor venomous.
- Is the Rhadinaea nuchalis dangerous?
- The Rhadinaea nuchalis is not dangerous to humans. It has no medically significant venom and bites only defensively if cornered or handled.
- Where does the Rhadinaea nuchalis live?
- The Rhadinaea nuchalis has verified records in 1 country, including Mexico. See the distribution section below for its full range.
Where it is found
More Colubridae snakes
Pine Woods LittersnakeRhadinaea flavilata
Adorned Graceful Brown SnakeRhadinaea decorata
Pine-Oak SnakeRhadinaea taeniata
Western Graceful Brown SnakeRhadinaea hesperia
Crowned Graceful Brown SnakeRhadinaea laureata
Gaige's Pine Forest SnakeRhadinaea gaigeae
Nuevo Leon Graceful Brown SnakeRhadinaea montana
Thick Graceful Brown SnakeRhadinaea calligaster
Classification
How scientists group this snake, from the broadest category down to the exact species. Each step narrows to its closest relatives.
- OrderThe broad group of scaled reptiles: all snakes and lizards
- Squamata
- FamilyA group of related snakes that share key traits
- Colubridae
- GenusA close-knit group of very similar species
- Rhadinaea
- SpeciesThis exact snake, named in the two-part scientific name
- Rhadinaea nuchalis
Keep learning
- What to Do If You Find a SnakeFound a snake at home or on a trail? Here is how to stay calm, give it space, identify it safely, and know when to call a professional.
- Venomous vs Nonvenomous: How to Tell the DifferenceThe folk rules for telling venomous snakes apart, where each one fails, and why location-based identification beats guessing by sight.
- What Is a Snake? Anatomy and the BasicsA clear overview of what makes a snake a snake: limbless body plan, anatomy, evolution from lizards, species diversity, and why they are ectothermic.
- How to Keep Snakes Out of Your Yard and HomeA practical guide to keeping snakes out of your yard and home using habitat changes that work, plus what to skip and what to do if one shows up.
Distribution from GBIF & iNaturalist. Venom status per CDC. Background: Wikipedia. Informational only. Never handle a snake to identify it.