Small burrowing snake
Tantilla selmae
HarmlessThis species has no widely used English common name.

Tantilla selmae is a non-venomous snake in the Colubridae family, recorded in 27 countries.
- Also called
- Small burrowing snake
- Family
- Colubridae
- Size
- Tiny, 6–12 in.
- Habitat
- Under rocks, logs, and leaf litter across many habitats.
- Behavior
- Secretive, burrowing insect- and centipede-eaters; almost never seen above ground.
- Identify
- Tiny and slender, plain brown or tan, often with a darker head cap.
About the Tantilla selmae
The Tantilla selmae belongs to the Colubridae family, colubrids. The largest snake family, and the one most snakes you meet belong to.
Colubridae is by far the biggest family of snakes, with roughly two thousand species worldwide. It is a catch-all of mostly slender, agile, day-active snakes: ratsnakes, kingsnakes, gartersnakes, watersnakes, racers, whipsnakes, and hundreds more. The vast majority are harmless to people and kill prey by grabbing or constricting rather than with venom.
Its genus, Tantilla, covers Black-headed and crowned snakes. Tantilla are small, secretive burrowers best known for the dark cap or collar many of them wear behind a pale neck.
The Tantilla selmae is non-venomous and harmless to people. Like most snakes it is a quiet predator that helps keep rodents and other small prey in check. Tiny and slender, plain brown or tan, often with a darker head cap.
Tiny, 6–12 in. Under rocks, logs, and leaf litter across many habitats.
It has been recorded across 27 countries, including the United States of America, Mexico, Brazil, Colombia and Ecuador. In the United States it has been documented in 25 states, including Texas, Oklahoma, Kansas and Florida.
Field-guide summary compiled from taxonomy and verified occurrence records. Detailed natural-history notes for this species are still being added.
Frequently asked: Tantilla selmae
- Is the Tantilla selmae venomous?
- No. The Tantilla selmae 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 Tantilla selmae poisonous?
- Snakes are venomous, not poisonous. "Poisonous" means harmful to eat or touch; "venomous" means injecting toxins through a bite. The Tantilla selmae is neither poisonous nor venomous.
- Is the Tantilla selmae dangerous?
- The Tantilla selmae is not dangerous to humans. It has no medically significant venom and bites only defensively if cornered or handled.
- Where does the Tantilla selmae live?
- The Tantilla selmae has verified records in 27 countries, including United States of America, Mexico, Brazil. See the distribution section below for its full range.
- How do I identify the Tantilla selmae?
- Tiny and slender, plain brown or tan, often with a darker head cap.
- How big does the Tantilla selmae get?
- Tiny, 6–12 in.
Where it is found
More Colubridae snakes
Flat-headed SnakeTantilla gracilis
Plains Black-headed SnakeTantilla nigriceps
Black-headed SnakeTantilla melanocephala
Southeastern Crowned SnakeTantilla coronata
Southwestern Blackhead SnakeTantilla hobartsmithi
Western Black-headed SnakeTantilla planiceps
Bocourt's Black-headed SnakeTantilla bocourti
Florida Crowned SnakeTantilla relicta
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
- Tantilla
- SpeciesThis exact snake, named in the two-part scientific name
- Tantilla selmae
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. Informational only. Never handle a snake to identify it.