Reptiles of Big Bend National Park
The 2 reptiles you can find at Big Bend National Park, like the Common collared lizard — sizes, diets, and whether you should worry.
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Reptile Common collared lizard
Crotaphytus collaris
A bright, big-headed lizard with two black neck bands that can sprint on its back legs like a tiny dinosaur across the slickrock at Arches and Canyonlands.
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Reptile Western diamondback rattlesnake
Crotalus atrox
A big desert rattlesnake with diamond shapes down its back and a black-and-white "coon tail," most likely to be sunning near a trail at Big Bend or Saguaro.