Colubridae
Angel's Mountain Keelback
HarmlessTrimerodytes praemaxillaris

The Angel's Mountain Keelback (Trimerodytes praemaxillaris) is a non-venomous snake in the Colubridae family, recorded in 13 countries.
- Family
- Colubridae
About the Angel's Mountain Keelback
Trimerodytes praemaxillaris is a species of snake in the subfamily Natricinae of the family Colubridae. It is also known commonly as Angel's mountain keelback, Angel's stream snake, and the brown stream snake. The species is endemic to Southeast Asia.
Adapted from Wikipedia, available under CC BY-SA.
Frequently asked: Angel's Mountain Keelback
- Is the Angel's Mountain Keelback venomous?
- No. The Angel's Mountain Keelback (Trimerodytes praemaxillaris) 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 Angel's Mountain Keelback poisonous?
- Snakes are venomous, not poisonous. "Poisonous" means harmful to eat or touch; "venomous" means injecting toxins through a bite. The Angel's Mountain Keelback is neither poisonous nor venomous.
- Is the Angel's Mountain Keelback dangerous?
- The Angel's Mountain Keelback is not dangerous to humans. It has no medically significant venom and bites only defensively if cornered or handled.
- Where does the Angel's Mountain Keelback live?
- The Angel's Mountain Keelback has verified records in 13 countries, including China, Chinese Taipei, Hong Kong. See the distribution section below for its full range.
Where it is found
More Colubridae snakes
Mountain Water SnakeTrimerodytes percarinatus
Asiatic Water SnakeTrimerodytes aequifasciatus
Ringed Water SnakeTrimerodytes annularis
Banded Stream SnakeTrimerodytes balteatus
Yunnan Keelback Water SnakeTrimerodytes yunnanensis
Trimerodytes yapingiTrimerodytes yapingi
Common Garter SnakeThamnophis sirtalis
Common WatersnakeNerodia sipedon
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
- Trimerodytes
- SpeciesThis exact snake, named in the two-part scientific name
- Trimerodytes praemaxillaris
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.