• Sierra del Carmen

    Big Bend

    National Park Texas

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  • Extreme Water Shortage

    Extreme water shortage throughout park. Visitors are limited to 5 gallons per day, and are encouraged to conserve further when possible. Please consider bringing your own water to the park.

Lizards in Big Bend

Western Collared Lizard
Western Collared Lizard
NPS Photo/Big Bend National Park
 

Visitors to Big Bend NP most frequently see the whiptails, earless, and spiny lizards. Often, lizards will be heard and not seen as they scurry through the vegetation off the side of a trail, though ones that are sighted are often fast and hide easily. The largest lizards in the park are the Collared (Crotaphytus) and Leopard (Gambelia) lizards which can measure over a foot in total length. Both eat other lizards, insects, spiders, and small snakes.

The largest Texas horned lizard (Phrynosoma cornutum) ever recorded was found in Big Bend National Park. Texas horned lizards are not abundant in the park, and in the few places where they are located, they are not found in large numbers. However, there is no evidence yet, that suggests this is abnormal. It is more likely that Big Bend National Park doesn't have enough of the proper type of habitat necessary for these lizards. The main, and often only food for the Texas horned lizard is the harvester ant (Pogonomyrmex) which feeds mostly on grass seed. It is possible, if at one time there were larger grasslands in the Big Bend, there may have been a larger harvester ant population and thus a greater number of Texas horned lizards.

Did You Know?

The Chisos Mountains tower above the desert lowlands

Rising to nearly 8,000 feet, the Chisos Mountains are like an island in the desert. The cooler, forested habitat of the mountains is home to Arizona cypress, quaking aspen, Carmen mountains whitetail deer, and the Colima warbler.