Rubber Boa

A green snake on gravel next to a human hand
The rubber boa is one of six reptile species and the largest species found in the park.

NPS

 

Scientific Name

Charina bottae

Identification

  • Infrequently encountered in Yellowstone, perhaps due to its nocturnal and burrowing habits.
  • One of two species of snakes in the United States related to tropical boa constrictors and pythons.
  • Maximum length of 24 inches.
  • Back is gray or greenish-brown, belly is lemon yellow; scales are small and smooth, making it almost velvety to the touch.

Habitat and Behavior

  • Eats rodents.
  • May spend great deal of time partially buried under leaves and soil, and in rodent burrows.
  • Usually found in rocky areas near streams or rivers, with shrubs or trees nearby.
  • Recent sightings have occurred in the Bechler region and Gibbon Meadows.
 
 
The head of a brown spotted snake among grass

Reptiles

There are six reptile species in Yellowstone.

A tan and black snake on a rocky surface

Bullsnake

Bullsnakes are often mistaken for rattlesnakes because of their appearance and behavior.

A tan and brown spotted snake with rattler in a coil

Prairie Rattlesnake

Prairie rattlesnakes are the only dangerously venomous snakes in Yellowstone.

A dark gray, tan, and white striped lizard with small spikes on gravel

Sagebrush Lizard

The sagebrush lizard is the only lizard in Yellowstone.

A black and white snake on dead grass

Common Gartersnake

Common gartersnakes are only found in southern parts of the park.

A white and tan striped snake with black dots on a rock

Terrestrial Gartersnake

Terrestrial gartersnakes are the most common reptile in Yellowstone.

Last updated: June 14, 2017

Contact the Park

Mailing Address:

P.O. Box 168
Yellowstone National Park, WY 82190-0168

Phone:

(307) 344-7381

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