| A - C | D - K | L - R | S - Z |
| Saltuarius (Leaf-tailed Geckos) | |||
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Saltuarius swaini Southern Leaf-tailed Gecko |
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| Salvadora (Patch-nosed Snakes) | |||
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Salvadora hexalepis Western Patch-nosed Snake |
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Salvadora hexalepis hexalepis Desert Patch-nosed Snake |
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| Sanzinia (Madagascar Tree Boas) | |||
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Sanzinia madagascariensis Madagascar Tree Boa |
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| Saproscincus (Shade Skinks) | |||
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Saproscincus basiliscus Basal Shade Skink |
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Saproscincus challengeri Challenging Shade Skink |
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Saproscincus czechurai Czechura's Shade Skink |
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| Sauromalus (Chuckwallas) | |||
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Sauromalus ater Common Chuckwalla |
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| Scaphiopus (North American Spadefoots) | |||
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Scaphiopus couchii Couch's Spadefoot |
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| Sceloporus (Spiny Lizards) | |||
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Sceloporus clarkii Clark's Spiny Lizard |
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Sceloporus clarkii clarkii Sonoran Spiny Lizard |
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Sceloporus clarkii vallaris Plateau Spiny Lizard |
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Sceloporus cowlesi Southwestern Fence Lizard |
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Sceloporus graciosus Common Sagebrush Lizard |
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Sceloporus graciosus gracilis Western Sagebrush Lizard |
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Sceloporus graciosus graciosus Northern Sagebrush Lizard |
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Sceloporus jarrovi Yarrow's Spiny Lizard |
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Sceloporus magister Desert Spiny Lizard |
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Sceloporus magister magister Purple-backed Spiny Lizard |
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Sceloporus magister transversus Barred Spiny Lizard |
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Sceloporus magister uniformis Yellow-backed Spiny Lizard |
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Sceloporus malachitus Green Spiny Lizard |
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Sceloporus occidentalis Western Fence Lizard |
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Sceloporus occidentalis longipes Great Basin Fence Lizard |
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Sceloporus occidentalis occidentalis Northwestern Fence Lizard |
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Sceloporus orcutti Granite Spiny Lizard |
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Sceloporus teapensis Teapa Scaly Lizard |
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Sceloporus tristichus Plateau Lizard |
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Sceloporus undulatus Eastern Fence Lizard |
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Sceloporus virgatus Striped Plateau Lizard |
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Sceloporus woodi Florida Scrub Lizard |
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| Scinax (Snouted Treefrogs) | |||
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Scinax elaeochroa Narrow-headed Treefrog |
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| Scincella (Ground Skinks) | |||
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Scincella lateralis Little Brown Skink |
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| Sibon (Snail-eating Snakes) | |||
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Sibon nebulata Cloudy Snail-eating Snake |
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| Sistrurus (Pygmy Rattlesnakes) | |||
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Sistrurus miliarius Pygmy Rattlesnake |
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Sistrurus miliarius barbouri Dusky Pygmy Rattlesnake |
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| Smilisca (Cross-banded Treefrogs) | |||
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Smilisca phaeota Masked Treefrog |
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Smilisca sordida Drab Treefrog |
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| Sonora (North American Groundsnakes) | |||
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Sonora semiannulata Groundsnake |
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Sonora semiannulata semiannulata Variable Groundsnake |
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| Sphaerodactylus (Least Geckos) | |||
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Sphaerodactylus elegans Ashy Gecko |
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Sphaerodactylus elegans elegans Cuban Ashy Gecko |
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Sphaerodactylus notatus Reef Gecko |
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Sphaerodactylus notatus notatus Florida Reef Gecko |
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Sphaerodactylus savagei Savage's Least Gecko |
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| Sphenomorphus (Forest Skinks) | |||
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Sphenomorphus cherriei Striped Litter Skink |
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Sphenomorphus florensis Flores Forest Skink |
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Sphenomorphus florensis florensis Flores Forest Skink |
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Sphenomorphus striolatus Striped Forest Skink |
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Sphenomorphus striolatus striolatus Striped Forest Skink |
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| Spilotes (Tropical Ratsnakes) | |||
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Spilotes pullatus Tropical Rat Snake |
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| Storeria (North American Brownsnakes) | |||
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Storeria victa Florida Brownsnake |
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| Strophurus (Spiny-tailed Geckos) | |||
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Strophurus ciliaris Northern Spiny-tailed Gecko |
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Strophurus ciliaris ciliaris Northern Spiny-tailed Gecko |
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| Tantilla (Black-headed Snakes) | |||
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Tantilla hobartsmithi Smith's Black-headed Snake |
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| Taricha (Pacific Newts) | |||
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Taricha granulosa Rough-skinned Newt |
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Taricha granulosa granulosa Rough-skinned Newt |
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Taricha torosa California Newt |
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Taricha torosa sierrae Sierra Newt |
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Taricha torosa torosa Coast Range Newt |
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| Terrapene (American Box Turtles) | |||
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Terrapene ornata Ornate Box Turtle |
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Terrapene ornata luteola Desert Box Turtle |
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| Thamnophis (North American Gartersnakes) | |||
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Thamnophis atratus Aquatic Gartersnake |
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Thamnophis atratus atratus Santa Cruz Gartersnake |
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Thamnophis atratus hydrophilus Oregon Gartersnake |
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Thamnophis couchii Sierra Gartersnake |
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Thamnophis cyrtopsis Black-necked Gartersnake |
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Thamnophis cyrtopsis cyrtopsis Western Black-necked Gartersnake |
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Thamnophis elegans Terrestrial Gartersnake |
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Thamnophis elegans elegans Mountain Gartersnake |
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Thamnophis elegans terrestris Coast Gartersnake |
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Thamnophis elegans vagrans Wandering Gartersnake |
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Thamnophis hammondii Two-striped Gartersnake |
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Thamnophis ordinoides Northwestern Gartersnake |
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Thamnophis sauritus Eastern Ribbonsnake |
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Thamnophis sauritus sackenii Peninsula Ribbonsnake |
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Thamnophis sirtalis Common Gartersnake |
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Thamnophis sirtalis concinnus Red-spotted Gartersnake |
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Thamnophis sirtalis fitchi Valley Gartersnake |
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Thamnophis sirtalis infernalis California Red-sided Gartersnake |
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Thamnophis sirtalis sirtalis Eastern Gartersnake |
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Thamnophis sirtalis tetrataenia San Francisco Gartersnake |
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| Thecadactylus (Turniptail Geckos) | |||
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Thecadactylus rapicauda Turnip-tailed Gecko |
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| Trachemys (Sliders) | |||
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Trachemys scripta Pond Slider |
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Trachemys scripta elegans Red-eared Slider |
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Trachemys scripta ornata Mesoamerican Slider |
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| Tropidurus (Lava Lizards) | |||
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Tropidurus delanonis Lava Lizard |
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| Uma (Fringe-toed Lizards) | |||
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Uma inornata Coachella Valley Fringe-toed Lizard |
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Uma notata Colorado Desert Fringe-toed Lizard |
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Uma scoparia Mojave Fringe-toed Lizard |
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| Uroplatus (Flat-tail Geckos) | |||
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Uroplatus fimbriatus Common Leaf-tailed Gecko |
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Uroplatus sikorae Mossy Leaf-tailed Gecko |
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| Urosaurus (Tree and Brush Lizards) | |||
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Urosaurus graciosus Long-tailed Brush Lizard |
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Urosaurus graciosus graciosus Western Brush Lizard |
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Urosaurus nigricaudus Baja California Brush Lizard |
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Urosaurus ornatus Ornate Tree Lizard |
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Urosaurus ornatus schotti Schott's Tree Lizard |
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Urosaurus ornatus wrighti Cliff Tree Lizard |
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| Uta (Side-blotched Lizards) | |||
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Uta stansburiana Common Side-blotched Lizard |
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Uta stansburiana elegans Western Side-blotched Lizard |
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Uta stansburiana stansburiana Northern Side-blotched Lizard |
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Uta stansburiana stejnegeri Eastern Side-blotched Lizard |
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| Varanus (Monitors) | |||
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Varanus giganteus Perentie |
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Varanus gouldii Sand Monitor |
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Varanus komodoensis Komodo Dragon |
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Varanus niloticus Nile Monitor |
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Varanus salvator Water Monitor |
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Varanus varius Lace Monitor |
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| Xantusia (Night Lizards) | |||
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Xantusia vigilis Desert Night Lizard |
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Xantusia vigilis vigilis Yucca Night Lizard |
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| Zonosaurus (Girdled Lizards) | |||
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Zonosaurus madagascariensis Madagascar Girdled Lizard |
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| A - C | D - K | L - R | S - Z |
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