Reptiles & Amphibians of Big Bend National Park
The reptiles & amphibians most often spotted in Big Bend, ranked by recent research-grade observations.
6,488
recent observations
50
species listed
50
reptiles & amphibians
Naturalists have logged 6,488 research-grade observations across the 50 most-recorded species in Big Bend. The most frequently seen is the Greater Earless Lizard, with 949 recorded sightings.
Rarer finds confirmed in Big Bend include Eastern Black-tailed Rattlesnake and Southwestern Blackhead Snake - uncommon enough that a sighting is worth logging.
Most-observed reptiles & amphibians in Big Bend
Greater Earless Lizard
Cophosaurus texanus
949 observations
Western Diamond-backed Rattlesnake
Crotalus atrox
495 observations
Rusty-rumped Whiptail
Aspidoscelis scalaris
359 observations
Canyon Lizard
Sceloporus merriami
331 observations
Marbled Whiptail
Aspidoscelis marmoratus
281 observations
Common Side-blotched Lizard
Uta stansburiana
272 observations
Eastern Black-tailed Rattlesnake
Crotalus ornatus
235 observations
Red-spotted Toad
Anaxyrus punctatus
223 observations
Crevice Spiny Lizard
Sceloporus poinsettii
219 observations
Big Bend Slider
Trachemys gaigeae
212 observations
Trans-pecos Ratsnake
Bogertophis subocularis
186 observations
Texas Alligator Lizard
Gerrhonotus infernalis
182 observations
Southwestern Fence Lizard
Sceloporus cowlesi
165 observations
Chihuahuan Nightsnake
Hypsiglena jani
152 observations
Spiny Softshell
Apalone spinifera
146 observations
Common Checkered Whiptail
Aspidoscelis tesselatus
138 observations
Texas Banded Gecko
Coleonyx brevis
130 observations
Ornate Tree Lizard
Urosaurus ornatus
114 observations
Long-nosed Snake
Rhinocheilus lecontei
111 observations
Gopher Snake
Pituophis catenifer
105 observations
Eastern Collared Lizard
Crotaphytus collaris
102 observations
Rio Grande Leopard Frog
Lithobates berlandieri
98 observations
Common Coachwhip
Masticophis flagellum
91 observations
Mediterranean House Gecko
Hemidactylus turcicus
89 observations
Twin-spotted Spiny Lizard
Sceloporus bimaculosus
76 observations
Couch's Spadefoot
Scaphiopus couchii
75 observations
Texas Toad
Anaxyrus speciosus
73 observations
Black-necked Garter Snake
Thamnophis cyrtopsis
66 observations
Roundtail Horned Lizard
Phrynosoma modestum
63 observations
Baird's Ratsnake
Pantherophis bairdi
57 observations
Plain-bellied Watersnake
Nerodia erythrogaster
54 observations
Green Anole
Anolis carolinensis
54 observations
Big Bend Patch-nosed Snake
Salvadora deserticola
51 observations
Great Plains Ground Snake
Sonora episcopa
45 observations
Canyon Tree Frog
Dryophytes arenicolor
44 observations
Mojave Rattlesnake
Crotalus scutulatus
41 observations
Striped Whipsnake
Masticophis taeniatus
39 observations
Chihuahuan Spotted Whiptail
Aspidoscelis exsanguis
39 observations
Glossy Snake
Arizona elegans
36 observations
American Bullfrog
Lithobates catesbeianus
32 observations
Mountain Patch-nosed Snake
Salvadora grahamiae
30 observations
Arizona Striped Whiptail
Aspidoscelis arizonae
30 observations · iNaturalist
Texas Lyre Snake
Trimorphodon vilkinsonii
29 observations · iNaturalist
Rock Rattlesnake
Crotalus lepidus
28 observations
Green Treefrog
Dryophytes cinereus
26 observations · iNaturalist
Checkered Garter Snake
Thamnophis marcianus
23 observations
Southwestern Blackhead Snake
Tantilla hobartsmithi
23 observations
Reticulated Gecko
Coleonyx reticulatus
23 observations · iNaturalist
Pond Slider
Trachemys scripta
23 observations
Great Plains Skink
Plestiodon obsoletus
23 observations
Reptiles & Amphibians in nearby places
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