Reptiles & Amphibians of Big Bend National Park
The reptiles & amphibians most often spotted in Big Bend, ranked by recent research-grade observations.
6,320
recent observations
50
species listed
50
reptiles & amphibians
Naturalists have logged 6,320 research-grade observations across the 50 most-recorded species in Big Bend. The most frequently seen is the Greater Earless Lizard, with 936 recorded sightings.
Most-observed reptiles & amphibians in Big Bend
Greater Earless Lizard
Cophosaurus texanus
936 observations
Western Diamond-backed Rattlesnake
Crotalus atrox
477 observations
Rusty-rumped Whiptail
Aspidoscelis scalaris
347 observations · iNaturalist
Canyon Lizard
Sceloporus merriami
325 observations · iNaturalist
Marbled Whiptail
Aspidoscelis marmoratus
270 observations · iNaturalist
Common Side-blotched Lizard
Uta stansburiana
261 observations
Eastern Black-tailed Rattlesnake
Crotalus ornatus
231 observations · iNaturalist
Red-spotted Toad
Anaxyrus punctatus
214 observations
Big Bend Slider
Trachemys gaigeae
211 observations
Crevice Spiny Lizard
Sceloporus poinsettii
204 observations · iNaturalist
Texas Alligator Lizard
Gerrhonotus infernalis
180 observations
Trans-pecos Ratsnake
Bogertophis subocularis
177 observations
Southwestern Fence Lizard
Sceloporus cowlesi
163 observations · iNaturalist
Chihuahuan Nightsnake
Hypsiglena jani
151 observations · iNaturalist
Spiny Softshell
Apalone spinifera
140 observations
Common Checkered Whiptail
Aspidoscelis tesselatus
139 observations · iNaturalist
Texas Banded Gecko
Coleonyx brevis
126 observations · iNaturalist
Ornate Tree Lizard
Urosaurus ornatus
112 observations
Long-nosed Snake
Rhinocheilus lecontei
110 observations
Gopher Snake
Pituophis catenifer
102 observations
Eastern Collared Lizard
Crotaphytus collaris
100 observations
Rio Grande Leopard Frog
Lithobates berlandieri
97 observations · iNaturalist
Common Coachwhip
Masticophis flagellum
90 observations
Mediterranean House Gecko
Hemidactylus turcicus
81 observations
Twin-spotted Spiny Lizard
Sceloporus bimaculosus
75 observations · iNaturalist
Texas Toad
Anaxyrus speciosus
70 observations · iNaturalist
Couch's Spadefoot
Scaphiopus couchii
68 observations · iNaturalist
Black-necked Garter Snake
Thamnophis cyrtopsis
65 observations
Roundtail Horned Lizard
Phrynosoma modestum
62 observations · iNaturalist
Baird's Ratsnake
Pantherophis bairdi
56 observations · iNaturalist
Plain-bellied Watersnake
Nerodia erythrogaster
53 observations
Green Anole
Anolis carolinensis
52 observations
Big Bend Patch-nosed Snake
Salvadora deserticola
49 observations · iNaturalist
Great Plains Ground Snake
Sonora episcopa
45 observations · iNaturalist
Canyon Tree Frog
Dryophytes arenicolor
44 observations · iNaturalist
Mojave Rattlesnake
Crotalus scutulatus
39 observations
Chihuahuan Spotted Whiptail
Aspidoscelis exsanguis
39 observations · iNaturalist
Striped Whipsnake
Masticophis taeniatus
38 observations
Glossy Snake
Arizona elegans
36 observations
American Bullfrog
Lithobates catesbeianus
32 observations
Texas Lyre Snake
Trimorphodon vilkinsonii
29 observations · iNaturalist
Mountain Patch-nosed Snake
Salvadora grahamiae
28 observations · iNaturalist
Rock Rattlesnake
Crotalus lepidus
28 observations
Arizona Striped Whiptail
Aspidoscelis arizonae
28 observations · iNaturalist
Green Treefrog
Dryophytes cinereus
25 observations · iNaturalist
Checkered Garter Snake
Thamnophis marcianus
23 observations · iNaturalist
Southwestern Blackhead Snake
Tantilla hobartsmithi
23 observations · iNaturalist
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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