Trans-Pecos Rat Snake
Bogertophis subocularis
A slender desert rat snake with a distinctive H-shaped or blotched pattern, found in rocky canyons and limestone hills of the Chihuahuan Desert.
- Venomous?
- Non-venomous
- Adult length
- 1.1-1.7 m (3.5-5.5 ft)
- Range
- Trans-Pecos Texas, southern New Mexico, and northern Mexico
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Overview
The Trans-Pecos rat snake is a distinctive desert-dwelling colubrid known for its large eyes and unique dorsal pattern, which often forms H-shaped or ladder-like markings along a pale background. It occupies rugged limestone canyons and rocky slopes of the Chihuahuan Desert.
Highly nocturnal, it is rarely seen during the day, sheltering in rock crevices and emerging at night to hunt rodents and bats.
How to identify it
- Pale yellow, tan, or cream ground color
- Dark brown H-shaped or connected blotch markings down the back
- Large eyes adapted for nocturnal activity
- Smooth scales, slender build
- Round pupils
Habitat & range
Found in limestone canyons, rocky hillsides, and desert scrub of the Trans-Pecos region of Texas, southern New Mexico, and adjacent Mexico.
Behavior, diet & reproduction
Strongly nocturnal, hunting rodents and bats by constriction, sometimes near cave entrances. Lays eggs in rock crevices or loose soil during summer.
Frequently asked questions
Is the Trans-Pecos rat snake venomous?
No, it is nonvenomous.
What is unique about its pattern?
It often displays H-shaped or connected blotch markings that distinguish it from other rat snakes.
Does it hunt bats?
Yes, in areas near caves it is known to prey on bats in addition to rodents.
Trans-Pecos Rat Snake guides
In-depth guides for identifying and understanding Trans-Pecos Rat Snake.
