Viperidae
Mixcoatlus browni
VenomousThis species has no widely used English common name.



3 photographs of the Mixcoatlus browni. (c) Katiya (Yekaterina Pavlova), some rights reserved (CC BY-NC).
Mixcoatlus browni is a venomous snake in the Viperidae family, recorded in 1 country.
If you are bitten
This is a venomous snake. Treat any bite as a medical emergency: stay calm, keep the bitten limb still and roughly level with the heart, remove rings and tight clothing, and get to emergency care immediately. Do not apply a tourniquet, cut the wound, apply ice, or try to suck out venom. Call your local emergency number or poison center.
- Family
- Viperidae
- Danger
- high
About the Mixcoatlus browni
Mixcoatlus browni (commonly known as Brown's montane pit viper, sometimes Mexican montane pitviper) is a species of pit viper found at high elevations in Guerrero, Mexico. This species was previously placed in the genus Agkistrodon, where it was considered to be a junior synonym of Cerrophidion barbouri. Molecular evidence has since demonstrated that M. browni is a distinct species and the genus name was subsequently changed.
The genus Mixcoatlus is derived from the Nahuatl word Mixcoatl or "cloud serpent", a deity of the Aztec and several other Mesoamerica civilizations. This name also refers to the geographic restriction of this clade to elevations above 2,000 metres (6,600 ft).
Description
Not much is known about this species. This species is diurnal and it is usually found basking or moving throughout the day. This species has been seen by researchers to have more of a prehensile tail than other species in this genus. There is currently no evidence to suggest that M. browni is arboreal, although it does climb low vegetation.
Geographic range
Mixcoatlus browni is constricted to the cloud forests of western Sierra Madre del Sur in Guerrero, Mexico. They been recorded at elevations up to 3,296 metres (10,814 ft) above sea level.
Adapted from Wikipedia, available under CC BY-SA.
Frequently asked: Mixcoatlus browni
- Is the Mixcoatlus browni venomous?
- Yes. The Mixcoatlus browni is venomous and belongs to the Viperidae family (viper). Its bite is considered high risk to people. Treat any bite as a medical emergency.
- Is the Mixcoatlus browni poisonous?
- Snakes are venomous, not poisonous. "Poisonous" means harmful to eat or touch; "venomous" means injecting toxins through a bite. The Mixcoatlus browni is venomous, delivering venom through a bite.
- Is the Mixcoatlus browni dangerous?
- This is a venomous snake. Treat any bite as a medical emergency: stay calm, keep the bitten limb still and roughly level with the heart, remove rings and tight clothing, and get to emergency care immediately. Do not apply a tourniquet, cut the wound, apply ice, or try to suck out venom. Call your local emergency number or poison center.
- Where does the Mixcoatlus browni live?
- The Mixcoatlus browni has verified records in 1 country, including Mexico. See the distribution section below for its full range.
If you are bitten by the Mixcoatlus browni
Do
- Get away from the snake and stay calm. Most bites worsen when people panic or try again to handle the snake.
- Call 911 or Poison Control (1-800-222-1222) right away. Antivenom works best when given early.
- Note the time of the bite and, from a safe distance, the snake's color and pattern, a phone photo is enough. Do not chase it.
- Keep the bitten limb still and at roughly heart level. Sit or lie down and limit movement.
- Remove rings, watches, and tight clothing near the bite before swelling starts.
- Gently wash the bite with soap and water and cover it with a clean, dry dressing.
Do not
- Do not cut the wound or try to suck out the venom.
- Do not apply a tourniquet or ice.
- Do not drink alcohol or caffeine.
- Do not take aspirin or ibuprofen, they can worsen bleeding. Acetaminophen is safer for pain.
- Do not try to catch or kill the snake. A dead snake can still bite by reflex.
First-aid guidance adapted from the U.S. Centers for Disease Control and Prevention (CDC NIOSH), Venomous Snakes. Educational only; always follow the instructions of emergency responders.
Where it is found
More Viperidae snakes
Black-tailed Horned PitviperMixcoatlus melanurus
Barbour's Montane Pit ViperMixcoatlus barbouri
Western RattlesnakeCrotalus oreganus
Western Diamond-backed RattlesnakeCrotalus atrox
Eastern CopperheadAgkistrodon contortrix
Northern CottonmouthAgkistrodon piscivorus
AdderVipera berus
Timber RattlesnakeCrotalus horridus
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
- Viperidae
- GenusA close-knit group of very similar species
- Mixcoatlus
- SpeciesThis exact snake, named in the two-part scientific name
- Mixcoatlus browni
Keep learning
- Are Snakes Dangerous? The Real Risk, in PerspectiveMost snakes are harmless and avoid people. Here is the honest picture of snakebite risk worldwide and how to lower your own.
- Snakebite First Aid: What to Do (and What Never to Do)A clear, CDC-based guide to snakebite first aid: the steps that help, the popular myths that hurt, and how to tell a serious bite from a minor one.
- 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 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.
Distribution from GBIF & iNaturalist. Venom status per CDC. Background: Wikipedia. Informational only. Never handle a snake to identify it.