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97 reptile species in Big Bend National Park
Sceloporus merriami
Cophosaurus texanus
Crotalus atrox
Uta stansburiana
Sceloporus poinsettii
Urosaurus ornatus
Aspidoscelis marmoratus
Aspidoscelis tigris
Aspidoscelis scalaris
Bogertophis subocularis
Coleonyx brevis
Crotalus ornatus
Aspidoscelis inornatus
Rhinocheilus lecontei
Aspidoscelis gularis
Masticophis flagellum
Hypsiglena jani
Hypsiglena torquata
Gerrhonotus infernalis
Phrynosoma modestum
Thamnophis cyrtopsis
Pituophis catenifer
Sceloporus cowlesi
Crotaphytus collaris
Crotalus scutulatus
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