There are 180 reptiles that start with the letter S, from Sagebrush Lizard to Suriname Hog-nosed Snake. Below you will find them listed alphabetically along with some general information about each. Click the toggle view buttons in the top right corner to switch between the card and the table view.
For each item you will find the following information
Order: The subclass the reptiles belongs to
Habitat: The places or type of weather the reptiles lives in
Scientific name: The designation that scientists use to catalog the species
Name: Sagebrush Lizard
Order: Squamata
Habitat: Sagebrush deserts of western North America
Scientific name: Sceloporus graciosus
Name: Saharan Horned Viper
Order: Squamata
Habitat: North Africa
Scientific name: Cerastes cerastes
Name: Saharan Spiny-tailed Lizard
Order: Squamata
Habitat: Arid regions of North Africa
Scientific name: Uromastyx geyri
Name: Sahel Horned Viper
Order: Squamata
Habitat: North Africa
Scientific name: Cerastes cerastioides
Name: Saipan Skink
Order: Squamata
Habitat: Saipan island
Scientific name: Emoia saipanensis
Name: Sakishima Habu
Order: Squamata
Habitat: Sakishima Islands
Scientific name: Protobothrops elegans
Name: Salish Sea Snake
Order: Squamata
Habitat: Pacific Northwest North America
Scientific name: Thamnophis concinnus
Name: Salish Sucker
Order: Testudines
Habitat: Freshwater streams and lakes
Scientific name: Catostomus sp.
Name: Salomon's Gecko
Order: Squamata
Habitat: Solomon Islands
Scientific name: Gehyra salomonis
Name: Salomonson's Skink
Order: Squamata
Habitat: Solomon Islands
Scientific name: Trachylepis solomonensis
Name: Saltuarius swaini
Order: Squamata
Habitat: Australia
Scientific name: Saltuarius swaini
Name: Sambirano Madagascan Gecko
Order: Squamata
Habitat: Madagascar
Scientific name: Paroedura sanctijohannis
Name: Samoa Skink
Order: Squamata
Habitat: Forests and grasslands of Samoa
Scientific name: Emoia samoensis
Name: Samoan Skink
Order: Squamata
Habitat: Samoa
Scientific name: Emoia samoensis
Name: San Esteban Chuckwalla
Order: Squamata
Habitat: San Esteban Island
Scientific name: Sauromalus varius
Name: San Juanito Anole
Order: Squamata
Habitat: Cuba
Scientific name: Anolis porcatus
Name: Sand Boa
Order: Squamata
Habitat: Arid regions of India and Pakistan
Scientific name: Eryx conicus
Name: Sand Darter
Order: Squamata
Habitat: Deserts and arid regions
Scientific name: Trioceros quadricornis
Name: Sand Skink
Order: Squamata
Habitat: Coastal scrub and pine flatwoods of Florida
Scientific name: Neoseps reynoldsi
Name: Sankaranarvana
Order: Squamata
Habitat: India
Scientific name: Sankaranarvana
Name: Santa Catalina Leaf-tailed Gecko
Order: Squamata
Habitat: Madagascar
Scientific name: Uroplatus sameiti
Name: Santa Cruz Ground Snake
Order: Squamata
Habitat: Brazil
Scientific name: Xenopholis scalaris
Name: Santa Fe Anole
Order: Squamata
Habitat: Cuba
Scientific name: Anolis santaferensis
Name: Sasquatch Mountain Viper
Order: Squamata
Habitat: Mountainous regions
Scientific name: Montivipera albizona
Name: Satanic Leaf-tailed Gecko
Order: Squamata
Habitat: Rainforests of Madagascar
Scientific name: Uroplatus spp.
Name: Satun Bent-toed Gecko
Order: Squamata
Habitat: Limestone forests of Thailand
Scientific name: Cyrtodactylus satunensis
Name: Satun Stream Snake
Order: Squamata
Habitat: Thailand
Scientific name: Opisthotropis satunensis
Name: Sauromalus ater
Order: Squamata
Habitat: Southwestern United States and northwestern Mexico
Scientific name: Sauromalus ater
Name: Sauromalus varius
Order: Squamata
Habitat: Desert islands
Scientific name: Sauromalus varius
Name: Savannah Monitor
Order: Squamata
Habitat: Savannas and grasslands of Africa
Scientific name: Varanus exanthematicus
Name: Savu Bent-toed Gecko
Order: Squamata
Habitat: Indonesia
Scientific name: Cyrtodactylus savu
Name: Savu Island Spiny-tailed Lizard
Order: Squamata
Habitat: Savu Island
Scientific name: Uromastyx sallei
Name: Savu Python
Order: Squamata
Habitat: Islands of Indonesia
Scientific name: Liasis mackloti
Name: Savu Snake
Order: Squamata
Habitat: Indonesia
Scientific name: Liasis savuensis
Name: Sawanwa
Order: Squamata
Habitat: India
Scientific name: Sawanwa
Name: Sawback Anole
Order: Squamata
Habitat: Endemic to Hispaniola
Scientific name: Anolis baccatus
Name: Sawback Cooter
Order: Testudines
Habitat: Freshwater lakes and rivers
Scientific name: Pseudemys concinna
Name: Say's Milk Snake
Order: Squamata
Habitat: Central North America
Scientific name: Lampropeltis sayii
Name: Scaled Armadillo Girdled Lizard
Order: Squamata
Habitat: Mountainous regions
Scientific name: Cordylus macropholis
Name: Scaly Horned Lizard
Order: Squamata
Habitat: Western North America
Scientific name: Phrynosoma douglasii
Name: Scaly-eyed Gecko
Order: Squamata
Habitat: Central Asia
Scientific name: Teratoscincus scincus
Name: Scarce Racer
Order: Squamata
Habitat: Grasslands and open habitats of central North America
Scientific name: Coluber constrictor
Name: Scheltopusik
Order: Squamata
Habitat: Southeastern Europe and western Asia
Scientific name: Pseudopus apodus
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Name: Scheltopusik (European Glass Lizard)
Order: Squamata
Habitat: Southeastern Europe and southwestern Asia
Scientific name: Ophisaurus apodus
Name: Schlegel's Dwarf Monitor
Order: Squamata
Habitat: Indonesia
Scientific name: Varanus jobiensis
Name: Schlegel's Java Snake
Order: Squamata
Habitat: Indonesia
Scientific name: Holochelus schlegel
Name: Schlegel's Skink
Order: Squamata
Habitat: Japan
Scientific name: Plestiodon japonicus
Name: Schneider's Dwarf Gecko
Order: Squamata
Habitat: Tropical forests
Scientific name: Sphaerodactylus schneideri
Name: Schneider's Leaf-tailed Gecko
Order: Squamata
Habitat: Madagascar
Scientific name: Uroplatus sameiti
Name: Schneider's Skink
Order: Squamata
Habitat: North Africa and Middle East
Scientific name: Eumeces schneideri
Name: Schreiber's Crowned Snake
Order: Squamata
Habitat: Mexico
Scientific name: Tantilla scripta
Name: Schreibers's Skink
Order: Squamata
Habitat: Southeast Europe
Scientific name: Eumeces schneideri
Name: Schrenck's Racer
Order: Squamata
Habitat: Forested regions
Scientific name: Elaphe schrenckii
Name: Schwartz's Skink
Order: Squamata
Habitat: Coastal regions of the southeastern US
Scientific name: Plestiodon schwartzi
Name: Scinax
Order: Anura
Habitat: Central and South America
Scientific name: Scinax
Name: Scinax canastrensis
Order: Anura
Habitat: Brazil
Scientific name: Scinax canastrensis
Name: Scinax elaneae
Order: Anura
Habitat: Brazil
Scientific name: Scinax elaneae
Name: Scinax similis
Order: Anura
Habitat: Brazil
Scientific name: Scinax similis
Name: Scincella lateralis
Order: Squamata
Habitat: Eastern United States
Scientific name: Scincella lateralis
Name: Scissor-tailed Skink
Order: Squamata
Habitat: Malaysia
Scientific name: Larutia guentheri
Name: Scolecosaurus
Order: Squamata
Habitat: South America
Scientific name: Scolecosaurus
Name: Scorpion Mud Turtle
Order: Testudines
Habitat: Southeastern United States
Scientific name: Macrochelys temminckii
Name: Scotophaeus
Order: Squamata
Habitat: Worldwide
Scientific name: Scotophaeus
Name: Screaming Hairy Frog
Order: Anura
Habitat: Tropical forests of Central Africa
Scientific name: Trichobatrachus robustus
Name: Scrub Python
Order: Squamata
Habitat: Australia
Scientific name: Morelia bredli
Name: Sehlstedt's Wall Lizard
Order: Squamata
Habitat: Italy
Scientific name: Podarcis sicula
Name: Selangor Keeled Snake
Order: Squamata
Habitat: Malaysia
Scientific name: Xenodermus javanicus
Name: Semaphore Gecko
Order: Squamata
Habitat: Middle East
Scientific name: Pristurus rupestris
Name: Semo Skink
Order: Squamata
Habitat: New Zealand
Scientific name: Oligosoma semoni
Name: Sepik Monitor
Order: Squamata
Habitat: New Guinea
Scientific name: Varanus semiremex
Name: Serrated Gecko
Order: Squamata
Habitat: Australia
Scientific name: Gehyra serrata
Name: Serrated Hinge-back Tortoise
Order: Testudines
Habitat: Forests and savannas of West and Central Africa
Scientific name: Kinixys erosa
Name: Seychelles Caecilian
Order: Gymnophiona
Habitat: Seychelles
Scientific name: Hypogeophis rostratus
Name: Seychelles Giant Gecko
Order: Squamata
Habitat: Seychelles
Scientific name: Ailuronyx seychellensis
Name: Seychelles Giant Tortoise
Order: Testudines
Habitat: Islands of Seychelles
Scientific name: Aldabrachelys gigantea
Name: Shale Barren Rock Skink
Order: Squamata
Habitat: Shale barrens of the Appalachian region
Scientific name: Plestiodon laticeps
Name: Sharpe's Cobra
Order: Squamata
Habitat: Tropical forests
Scientific name: Naja sharpeii
Name: Sharpe's Greenbul
Order: Squamata
Habitat: Tanzania
Scientific name: Rhampholeon sharpranus
Name: Sharptail Snake
Order: Squamata
Habitat: Pacific Northwest of North America
Scientific name: Contia tenuis
Name: Shaw's Burrowing Snake
Order: Squamata
Habitat: Tropical forests
Scientific name: Sibynophis collaris
Name: Shekhar's Saw-scaled Viper
Order: Squamata
Habitat: Central India
Scientific name: Echis shekharii
Name: Sheltopusik
Order: Squamata
Habitat: Southeastern Europe
Scientific name: Ophisaurus apodus
Name: Shingle-back Skink
Order: Squamata
Habitat: Australia
Scientific name: Trachydosaurus rugosus
Name: Shingleback
Order: Squamata
Habitat: Arid and semi-arid regions of Australia
Scientific name: Tiliqua rugosa
Name: Shona Skink
Order: Squamata
Habitat: Zimbabwe
Scientific name: Trachylepis spilogaster
Name: Shongwal Banded Gecko
Order: Squamata
Habitat: Myanmar
Scientific name: Gekko shongwalensis
Name: Short-horned Lizard
Order: Squamata
Habitat: Western North America
Scientific name: Phrynosoma hernandesi
Name: Short-nosed Vine Snake
Order: Squamata
Habitat: Africa
Scientific name: Thelotornis kirtlandii
Name: Shovel-nosed Snake
Order: Squamata
Habitat: Southwestern United States
Scientific name: Chionactis occipitalis
Name: Siamese Crocodile
Order: Crocodilia
Habitat: Freshwater marshes
Scientific name: Crocodylus siamensis
Name: Siamese Peninsula Slug Snake
Order: Squamata
Habitat: Thailand
Scientific name: Asthenodipsas vertebralis
Name: Siau Island Cobra
Order: Squamata
Habitat: Siau Island
Scientific name: Naja sputatrix
Name: Siberian Pit Viper
Order: Squamata
Habitat: East Asia
Scientific name: Gloydius blomhoffii
Name: Sierra Garter Snake
Order: Squamata
Habitat: Western North America
Scientific name: Thamnophis couchii
Name: Sierra Madre Garter Snake
Order: Squamata
Habitat: Mountainous regions
Scientific name: Thamnophis eques
Name: Sierra Nevada Garter Snake
Order: Squamata
Habitat: California
Scientific name: Thamnophis couchii
Name: Silver Boa
Order: Squamata
Habitat: Bahamas
Scientific name: Chilabothrus argentum
Name: Silver-thread Snake
Order: Squamata
Habitat: India
Scientific name: Tricheilostoma jasonii
Name: Silvery Leaf-tailed Gecko
Order: Squamata
Habitat: Tropical forests
Scientific name: Uroplatus sameiti
Name: Singapore Bronzeback
Order: Squamata
Habitat: Tropical forests
Scientific name: Dendrelaphis cyanochloris
Name: Singular Dwarf Gecko
Order: Squamata
Habitat: Tanzania
Scientific name: Lygodactylus singularis
Name: Six-lined Racerunner
Order: Squamata
Habitat: Southeastern United States
Scientific name: Aspidoscelis sexlineata
Name: Skeletal Leaf-tailed Gecko
Order: Squamata
Habitat: Madagascar
Scientific name: Uroplatus sameiti
Name: Skink
Order: Squamata
Habitat: North America
Scientific name: Plestiodon fasciatus
Name: Slender Burrowing Snake
Order: Squamata
Habitat: Southeast Asia
Scientific name: Calamaria lumbricoidea
Name: Slender Dwarf Snake
Order: Squamata
Habitat: Philippines
Scientific name: Oreocalamus hanitschi
Name: Slender Glass Lizard
Order: Squamata
Habitat: Central United States
Scientific name: Ophisaurus attenuatus
Name: Slender Horned Viper
Order: Squamata
Habitat: North Africa and Middle East
Scientific name: Cerastes cerastes
Name: Slender Sand Snake
Order: Squamata
Habitat: Africa
Scientific name: Psammophis subtilis
Name: Slender-necked Leaf-tailed Gecko
Order: Squamata
Habitat: Tropical forests
Scientific name: Uroplatus ebenaui
Name: Slender-tailed Gecko
Order: Squamata
Habitat: Deserts and arid regions
Scientific name: Nephurus levis
Name: Slender-toed Gecko
Order: Squamata
Habitat: Africa
Scientific name: Hemidactylus gracilis
Name: Slow Worm
Order: Squamata
Habitat: Europe
Scientific name: Anguis fragilis
Name: Smith's Leaf-toed Gecko
Order: Squamata
Habitat: India
Scientific name: Hemidactylus smithi
Name: Smooth Basilisk
Order: Squamata
Habitat: Central America
Scientific name: Basiliscus galeritus
Name: Smooth Blind Snake
Order: Squamata
Habitat: Southwestern United States
Scientific name: Leptotyphlops dulcis
Name: Smooth Collared Lizard
Order: Squamata
Habitat: Deserts and arid regions
Scientific name: Crotaphytus collaris
Name: Smooth Green Racer
Order: Squamata
Habitat: Eastern North America
Scientific name: Opheodrys vernalis
Name: Smooth Green Snake
Order: Squamata
Habitat: Eastern North America
Scientific name: Opheodrys vernalis
Name: Smooth Softshell Turtle
Order: Testudines
Habitat: Central and eastern United States
Scientific name: Apalone mutica
Name: Smooth-fronted Caiman
Order: Crocodilia
Habitat: Amazon Basin in South America
Scientific name: Paleosuchus trigonatus
Name: Smooth-scaled Viper
Order: Squamata
Habitat: Africa
Scientific name: Echis leucogaster
Name: Smooth-tailed Monitor
Order: Squamata
Habitat: Australia
Scientific name: Varanus caudolineatus
Name: Socotra Chameleon
Order: Squamata
Habitat: Islands of Socotra
Scientific name: Chamaeleo monachus
Name: Socotra Gecko
Order: Squamata
Habitat: Islands of Socotra
Scientific name: Haemodracon riebeckii
Name: Socotra Horned Viper
Order: Squamata
Habitat: Islands of Socotra
Scientific name: Bitis inornata
Name: Sokoke Writhing Snake
Order: Squamata
Habitat: Kenya
Scientific name: Uranops sekukuniensis
Name: Somalian Fringed Gecko
Order: Squamata
Habitat: Deserts and arid regions
Scientific name: Acanthodactylus robustus
Name: Sonoran Gopher Snake
Order: Squamata
Habitat: Southwestern United States and northwestern Mexico
Scientific name: Pituophis catenifer affinis
Name: Sonoran Mountain Kingsnake
Order: Squamata
Habitat: Southwestern United States and northwestern Mexico
Scientific name: Lampropeltis pyromelana
Name: South African Dwarf Burrowing Snake
Order: Squamata
Habitat: South Africa
Scientific name: Xenocalamus bicolor
Name: South African Python
Order: Squamata
Habitat: Savannas and woodlands
Scientific name: Python natalensis
Name: South American Bushmaster
Order: Squamata
Habitat: Tropical forests
Scientific name: Lachesis muta
Name: South American Rattlesnake
Order: Squamata
Habitat: Tropical forests
Scientific name: Crotalus durissus
Name: South Cone Snake
Order: Squamata
Habitat: South America
Scientific name: Tachymenis chilensis
Name: Southern Burmese Python
Order: Squamata
Habitat: Southeast Asia
Scientific name: Python bivittatus
Name: Southern Crevice Lizard
Order: Squamata
Habitat: South Africa
Scientific name: Platysaurus capensis
Name: Southern Hognose Snake
Order: Squamata
Habitat: Southeastern US
Scientific name: Heterodon simus
Name: Southern Rubber Boa
Order: Squamata
Habitat: Western North America
Scientific name: Charina bottae
Name: Southern Water Snake
Order: Squamata
Habitat: Southeastern United States
Scientific name: Nerodia fasciata
Name: Speckled Cordylid
Order: Squamata
Habitat: Southern Africa
Scientific name: Cordylus maculatus
Name: Speckled Dwarf Racer
Order: Squamata
Habitat: Deserts and arid regions
Scientific name: Hemorrhois ravergieri
Name: Speckled Dwarf Snake
Order: Squamata
Habitat: Middle East
Scientific name: Eirenis punctatolineatus
Name: Speckled Racer
Order: Squamata
Habitat: Mexico and Central America
Scientific name: Drymobius margaritiferus
Name: Spectacled Caiman
Order: Crocodilia
Habitat: Central and South America
Scientific name: Caiman crocodilus
Name: Spiny Agama
Order: Squamata
Habitat: Central Asia
Scientific name: Trapelus megalonyx
Name: Spiny Flathead
Order: Squamata
Habitat: Africa
Scientific name: Acanthocercus atricollis
Name: Spiny Lizard
Order: Squamata
Habitat: North America
Scientific name: Sceloporus sp.
Name: Spiny-tailed Iguana
Order: Squamata
Habitat: Western Mexico
Scientific name: Ctenosaura pectinata
Name: Spiny-tailed Monitor
Order: Squamata
Habitat: Australia
Scientific name: Varanus acanthurus
Name: Spotted Bush Snake
Order: Squamata
Habitat: Africa
Scientific name: Philothamnus semivariegatus
Name: Spotted Coral Snake
Order: Squamata
Habitat: Brazil
Scientific name: Micrurus corallinus
Name: Spotted Leaf-tailed Gecko
Order: Squamata
Habitat: Madagascar
Scientific name: Uroplatus spp.
Name: Spotted Leaf-toed Gecko
Order: Squamata
Habitat: Asia
Scientific name: Hemidactylus maculatus
Name: Spotted Pipe Snake
Order: Squamata
Habitat: Southeast Asia
Scientific name: Cylindrophis ruffus
Name: Spotted Turtle
Order: Testudines
Habitat: Eastern United States
Scientific name: Clemmys guttata
Name: Spotted Turtlehead
Order: Squamata
Habitat: Tropical forests
Scientific name: Trachyboa
Name: Spotted Wall Gecko
Order: Squamata
Habitat: Mediterranean region
Scientific name: Euleptes europaea
Name: Spotted Worm Snake
Order: Squamata
Habitat: South America
Scientific name: Leptotyphlops goudotii
Name: Spring Salamander
Order: Caudata
Habitat: Eastern North America
Scientific name: Gyrinophilus porphyriticus
Name: Sri Lankan Green Pit Viper
Order: Squamata
Habitat: Sri Lanka
Scientific name: Trimeresurus trigonocephalus
Name: Sri Lankan Hump-nosed Viper
Order: Squamata
Habitat: Sri Lanka
Scientific name: Hypnale hypnale
Name: Stahl's Dwarf Gecko
Order: Squamata
Habitat: Tanzania
Scientific name: Lygodactylus stahlkechi
Name: Staurotypus salvinii
Order: Testudines
Habitat: Freshwater lakes and rivers
Scientific name: Staurotypus salvinii
Name: Stejneger's Long-tailed Skink
Order: Squamata
Habitat: Tropical forests
Scientific name: Mabuya stejnegeri
Name: Stejneger's Skink
Order: Squamata
Habitat: Japan
Scientific name: Plestiodon stejnegeri
Name: Stink Pot
Order: Testudines
Habitat: Eastern North America
Scientific name: Sternotherus odoratus
Name: Stinkpot
Order: Testudines
Habitat: Eastern United States
Scientific name: Sternotherus odoratus
Name: Stokes' Skink
Order: Squamata
Habitat: Grasslands and scrublands
Scientific name: Oligosoma stokesii
Name: Striped House Gecko
Order: Squamata
Habitat: Southeast Asia
Scientific name: Hemidactylus kamolae
Name: Striped Legless Lizard
Order: Squamata
Habitat: Grasslands and scrublands
Scientific name: Delma impar
Name: Striped Swamp Snake
Order: Squamata
Habitat: Southeastern United States
Scientific name: Regina alleni
Name: Striped Worm Snake
Order: Squamata
Habitat: South America
Scientific name: Leptotyphlops albifrons
Name: Stuart's Dwarf Gecko
Order: Squamata
Habitat: Kenya
Scientific name: Lygodactylus stuarti
Name: Sublime Green Vine Snake
Order: Squamata
Habitat: Southeast Asia
Scientific name: Ahaetulla sublineata
Name: Sulawesi Spiny Lizard
Order: Squamata
Habitat: Tropical forests
Scientific name: Acanthosaura crucigera
Name: Sumatran Cobra
Order: Squamata
Habitat: Indonesia
Scientific name: Naja sumatrana
Name: Sumatran Ground Boa
Order: Squamata
Habitat: Indonesia
Scientific name: Candoia aspera
Name: Sunbeam Snake
Order: Squamata
Habitat: Tropical forests
Scientific name: Xenopeltis unicolor
Name: Suriname Hog-nosed Snake
Order: Squamata
Habitat: South America
Scientific name: Liophis cobella
| Name | Order | Habitat | Scientific name |
|---|---|---|---|
| Sagebrush Lizard | Squamata | Sagebrush deserts of western North America | Sceloporus graciosus |
| Saharan Horned Viper | Squamata | North Africa | Cerastes cerastes |
| Saharan Spiny-tailed Lizard | Squamata | Arid regions of North Africa | Uromastyx geyri |
| Sahel Horned Viper | Squamata | North Africa | Cerastes cerastioides |
| Saipan Skink | Squamata | Saipan island | Emoia saipanensis |
| Sakishima Habu | Squamata | Sakishima Islands | Protobothrops elegans |
| Salish Sea Snake | Squamata | Pacific Northwest North America | Thamnophis concinnus |
| Salish Sucker | Testudines | Freshwater streams and lakes | Catostomus sp. |
| Salomon's Gecko | Squamata | Solomon Islands | Gehyra salomonis |
| Salomonson's Skink | Squamata | Solomon Islands | Trachylepis solomonensis |
| Saltuarius swaini | Squamata | Australia | Saltuarius swaini |
| Sambirano Madagascan Gecko | Squamata | Madagascar | Paroedura sanctijohannis |
| Samoa Skink | Squamata | Forests and grasslands of Samoa | Emoia samoensis |
| Samoan Skink | Squamata | Samoa | Emoia samoensis |
| San Esteban Chuckwalla | Squamata | San Esteban Island | Sauromalus varius |
| San Juanito Anole | Squamata | Cuba | Anolis porcatus |
| Sand Boa | Squamata | Arid regions of India and Pakistan | Eryx conicus |
| Sand Darter | Squamata | Deserts and arid regions | Trioceros quadricornis |
| Sand Skink | Squamata | Coastal scrub and pine flatwoods of Florida | Neoseps reynoldsi |
| Sankaranarvana | Squamata | India | Sankaranarvana |
| Santa Catalina Leaf-tailed Gecko | Squamata | Madagascar | Uroplatus sameiti |
| Santa Cruz Ground Snake | Squamata | Brazil | Xenopholis scalaris |
| Santa Fe Anole | Squamata | Cuba | Anolis santaferensis |
| Sasquatch Mountain Viper | Squamata | Mountainous regions | Montivipera albizona |
| Satanic Leaf-tailed Gecko | Squamata | Rainforests of Madagascar | Uroplatus spp. |
| Satun Bent-toed Gecko | Squamata | Limestone forests of Thailand | Cyrtodactylus satunensis |
| Satun Stream Snake | Squamata | Thailand | Opisthotropis satunensis |
| Sauromalus ater | Squamata | Southwestern United States and northwestern Mexico | Sauromalus ater |
| Sauromalus varius | Squamata | Desert islands | Sauromalus varius |
| Savannah Monitor | Squamata | Savannas and grasslands of Africa | Varanus exanthematicus |
| Savu Bent-toed Gecko | Squamata | Indonesia | Cyrtodactylus savu |
| Savu Island Spiny-tailed Lizard | Squamata | Savu Island | Uromastyx sallei |
| Savu Python | Squamata | Islands of Indonesia | Liasis mackloti |
| Savu Snake | Squamata | Indonesia | Liasis savuensis |
| Sawanwa | Squamata | India | Sawanwa |
| Sawback Anole | Squamata | Endemic to Hispaniola | Anolis baccatus |
| Sawback Cooter | Testudines | Freshwater lakes and rivers | Pseudemys concinna |
| Say's Milk Snake | Squamata | Central North America | Lampropeltis sayii |
| Scaled Armadillo Girdled Lizard | Squamata | Mountainous regions | Cordylus macropholis |
| Scaly Horned Lizard | Squamata | Western North America | Phrynosoma douglasii |
| Scaly-eyed Gecko | Squamata | Central Asia | Teratoscincus scincus |
| Scarce Racer | Squamata | Grasslands and open habitats of central North America | Coluber constrictor |
| Scheltopusik | Squamata | Southeastern Europe and western Asia | Pseudopus apodus |
| Scheltopusik (European Glass Lizard) | Squamata | Southeastern Europe and southwestern Asia | Ophisaurus apodus |
| Schlegel's Dwarf Monitor | Squamata | Indonesia | Varanus jobiensis |
| Schlegel's Java Snake | Squamata | Indonesia | Holochelus schlegel |
| Schlegel's Skink | Squamata | Japan | Plestiodon japonicus |
| Schneider's Dwarf Gecko | Squamata | Tropical forests | Sphaerodactylus schneideri |
| Schneider's Leaf-tailed Gecko | Squamata | Madagascar | Uroplatus sameiti |
| Schneider's Skink | Squamata | North Africa and Middle East | Eumeces schneideri |
| Schreiber's Crowned Snake | Squamata | Mexico | Tantilla scripta |
| Schreibers's Skink | Squamata | Southeast Europe | Eumeces schneideri |
| Schrenck's Racer | Squamata | Forested regions | Elaphe schrenckii |
| Schwartz's Skink | Squamata | Coastal regions of the southeastern US | Plestiodon schwartzi |
| Scinax | Anura | Central and South America | Scinax |
| Scinax canastrensis | Anura | Brazil | Scinax canastrensis |
| Scinax elaneae | Anura | Brazil | Scinax elaneae |
| Scinax similis | Anura | Brazil | Scinax similis |
| Scincella lateralis | Squamata | Eastern United States | Scincella lateralis |
| Scissor-tailed Skink | Squamata | Malaysia | Larutia guentheri |
| Scolecosaurus | Squamata | South America | Scolecosaurus |
| Scorpion Mud Turtle | Testudines | Southeastern United States | Macrochelys temminckii |
| Scotophaeus | Squamata | Worldwide | Scotophaeus |
| Screaming Hairy Frog | Anura | Tropical forests of Central Africa | Trichobatrachus robustus |
| Scrub Python | Squamata | Australia | Morelia bredli |
| Sehlstedt's Wall Lizard | Squamata | Italy | Podarcis sicula |
| Selangor Keeled Snake | Squamata | Malaysia | Xenodermus javanicus |
| Semaphore Gecko | Squamata | Middle East | Pristurus rupestris |
| Semo Skink | Squamata | New Zealand | Oligosoma semoni |
| Sepik Monitor | Squamata | New Guinea | Varanus semiremex |
| Serrated Gecko | Squamata | Australia | Gehyra serrata |
| Serrated Hinge-back Tortoise | Testudines | Forests and savannas of West and Central Africa | Kinixys erosa |
| Seychelles Caecilian | Gymnophiona | Seychelles | Hypogeophis rostratus |
| Seychelles Giant Gecko | Squamata | Seychelles | Ailuronyx seychellensis |
| Seychelles Giant Tortoise | Testudines | Islands of Seychelles | Aldabrachelys gigantea |
| Shale Barren Rock Skink | Squamata | Shale barrens of the Appalachian region | Plestiodon laticeps |
| Sharpe's Cobra | Squamata | Tropical forests | Naja sharpeii |
| Sharpe's Greenbul | Squamata | Tanzania | Rhampholeon sharpranus |
| Sharptail Snake | Squamata | Pacific Northwest of North America | Contia tenuis |
| Shaw's Burrowing Snake | Squamata | Tropical forests | Sibynophis collaris |
| Shekhar's Saw-scaled Viper | Squamata | Central India | Echis shekharii |
| Sheltopusik | Squamata | Southeastern Europe | Ophisaurus apodus |
| Shingle-back Skink | Squamata | Australia | Trachydosaurus rugosus |
| Shingleback | Squamata | Arid and semi-arid regions of Australia | Tiliqua rugosa |
| Shona Skink | Squamata | Zimbabwe | Trachylepis spilogaster |
| Shongwal Banded Gecko | Squamata | Myanmar | Gekko shongwalensis |
| Short-horned Lizard | Squamata | Western North America | Phrynosoma hernandesi |
| Short-nosed Vine Snake | Squamata | Africa | Thelotornis kirtlandii |
| Shovel-nosed Snake | Squamata | Southwestern United States | Chionactis occipitalis |
| Siamese Crocodile | Crocodilia | Freshwater marshes | Crocodylus siamensis |
| Siamese Peninsula Slug Snake | Squamata | Thailand | Asthenodipsas vertebralis |
| Siau Island Cobra | Squamata | Siau Island | Naja sputatrix |
| Siberian Pit Viper | Squamata | East Asia | Gloydius blomhoffii |
| Sierra Garter Snake | Squamata | Western North America | Thamnophis couchii |
| Sierra Madre Garter Snake | Squamata | Mountainous regions | Thamnophis eques |
| Sierra Nevada Garter Snake | Squamata | California | Thamnophis couchii |
| Silver Boa | Squamata | Bahamas | Chilabothrus argentum |
| Silver-thread Snake | Squamata | India | Tricheilostoma jasonii |
| Silvery Leaf-tailed Gecko | Squamata | Tropical forests | Uroplatus sameiti |
| Singapore Bronzeback | Squamata | Tropical forests | Dendrelaphis cyanochloris |
| Singular Dwarf Gecko | Squamata | Tanzania | Lygodactylus singularis |
| Six-lined Racerunner | Squamata | Southeastern United States | Aspidoscelis sexlineata |
| Skeletal Leaf-tailed Gecko | Squamata | Madagascar | Uroplatus sameiti |
| Skink | Squamata | North America | Plestiodon fasciatus |
| Slender Burrowing Snake | Squamata | Southeast Asia | Calamaria lumbricoidea |
| Slender Dwarf Snake | Squamata | Philippines | Oreocalamus hanitschi |
| Slender Glass Lizard | Squamata | Central United States | Ophisaurus attenuatus |
| Slender Horned Viper | Squamata | North Africa and Middle East | Cerastes cerastes |
| Slender Sand Snake | Squamata | Africa | Psammophis subtilis |
| Slender-necked Leaf-tailed Gecko | Squamata | Tropical forests | Uroplatus ebenaui |
| Slender-tailed Gecko | Squamata | Deserts and arid regions | Nephurus levis |
| Slender-toed Gecko | Squamata | Africa | Hemidactylus gracilis |
| Slow Worm | Squamata | Europe | Anguis fragilis |
| Smith's Leaf-toed Gecko | Squamata | India | Hemidactylus smithi |
| Smooth Basilisk | Squamata | Central America | Basiliscus galeritus |
| Smooth Blind Snake | Squamata | Southwestern United States | Leptotyphlops dulcis |
| Smooth Collared Lizard | Squamata | Deserts and arid regions | Crotaphytus collaris |
| Smooth Green Racer | Squamata | Eastern North America | Opheodrys vernalis |
| Smooth Green Snake | Squamata | Eastern North America | Opheodrys vernalis |
| Smooth Softshell Turtle | Testudines | Central and eastern United States | Apalone mutica |
| Smooth-fronted Caiman | Crocodilia | Amazon Basin in South America | Paleosuchus trigonatus |
| Smooth-scaled Viper | Squamata | Africa | Echis leucogaster |
| Smooth-tailed Monitor | Squamata | Australia | Varanus caudolineatus |
| Socotra Chameleon | Squamata | Islands of Socotra | Chamaeleo monachus |
| Socotra Gecko | Squamata | Islands of Socotra | Haemodracon riebeckii |
| Socotra Horned Viper | Squamata | Islands of Socotra | Bitis inornata |
| Sokoke Writhing Snake | Squamata | Kenya | Uranops sekukuniensis |
| Somalian Fringed Gecko | Squamata | Deserts and arid regions | Acanthodactylus robustus |
| Sonoran Gopher Snake | Squamata | Southwestern United States and northwestern Mexico | Pituophis catenifer affinis |
| Sonoran Mountain Kingsnake | Squamata | Southwestern United States and northwestern Mexico | Lampropeltis pyromelana |
| South African Dwarf Burrowing Snake | Squamata | South Africa | Xenocalamus bicolor |
| South African Python | Squamata | Savannas and woodlands | Python natalensis |
| South American Bushmaster | Squamata | Tropical forests | Lachesis muta |
| South American Rattlesnake | Squamata | Tropical forests | Crotalus durissus |
| South Cone Snake | Squamata | South America | Tachymenis chilensis |
| Southern Burmese Python | Squamata | Southeast Asia | Python bivittatus |
| Southern Crevice Lizard | Squamata | South Africa | Platysaurus capensis |
| Southern Hognose Snake | Squamata | Southeastern US | Heterodon simus |
| Southern Rubber Boa | Squamata | Western North America | Charina bottae |
| Southern Water Snake | Squamata | Southeastern United States | Nerodia fasciata |
| Speckled Cordylid | Squamata | Southern Africa | Cordylus maculatus |
| Speckled Dwarf Racer | Squamata | Deserts and arid regions | Hemorrhois ravergieri |
| Speckled Dwarf Snake | Squamata | Middle East | Eirenis punctatolineatus |
| Speckled Racer | Squamata | Mexico and Central America | Drymobius margaritiferus |
| Spectacled Caiman | Crocodilia | Central and South America | Caiman crocodilus |
| Spiny Agama | Squamata | Central Asia | Trapelus megalonyx |
| Spiny Flathead | Squamata | Africa | Acanthocercus atricollis |
| Spiny Lizard | Squamata | North America | Sceloporus sp. |
| Spiny-tailed Iguana | Squamata | Western Mexico | Ctenosaura pectinata |
| Spiny-tailed Monitor | Squamata | Australia | Varanus acanthurus |
| Spotted Bush Snake | Squamata | Africa | Philothamnus semivariegatus |
| Spotted Coral Snake | Squamata | Brazil | Micrurus corallinus |
| Spotted Leaf-tailed Gecko | Squamata | Madagascar | Uroplatus spp. |
| Spotted Leaf-toed Gecko | Squamata | Asia | Hemidactylus maculatus |
| Spotted Pipe Snake | Squamata | Southeast Asia | Cylindrophis ruffus |
| Spotted Turtle | Testudines | Eastern United States | Clemmys guttata |
| Spotted Turtlehead | Squamata | Tropical forests | Trachyboa |
| Spotted Wall Gecko | Squamata | Mediterranean region | Euleptes europaea |
| Spotted Worm Snake | Squamata | South America | Leptotyphlops goudotii |
| Spring Salamander | Caudata | Eastern North America | Gyrinophilus porphyriticus |
| Sri Lankan Green Pit Viper | Squamata | Sri Lanka | Trimeresurus trigonocephalus |
| Sri Lankan Hump-nosed Viper | Squamata | Sri Lanka | Hypnale hypnale |
| Stahl's Dwarf Gecko | Squamata | Tanzania | Lygodactylus stahlkechi |
| Staurotypus salvinii | Testudines | Freshwater lakes and rivers | Staurotypus salvinii |
| Stejneger's Long-tailed Skink | Squamata | Tropical forests | Mabuya stejnegeri |
| Stejneger's Skink | Squamata | Japan | Plestiodon stejnegeri |
| Stink Pot | Testudines | Eastern North America | Sternotherus odoratus |
| Stinkpot | Testudines | Eastern United States | Sternotherus odoratus |
| Stokes' Skink | Squamata | Grasslands and scrublands | Oligosoma stokesii |
| Striped House Gecko | Squamata | Southeast Asia | Hemidactylus kamolae |
| Striped Legless Lizard | Squamata | Grasslands and scrublands | Delma impar |
| Striped Swamp Snake | Squamata | Southeastern United States | Regina alleni |
| Striped Worm Snake | Squamata | South America | Leptotyphlops albifrons |
| Stuart's Dwarf Gecko | Squamata | Kenya | Lygodactylus stuarti |
| Sublime Green Vine Snake | Squamata | Southeast Asia | Ahaetulla sublineata |
| Sulawesi Spiny Lizard | Squamata | Tropical forests | Acanthosaura crucigera |
| Sumatran Cobra | Squamata | Indonesia | Naja sumatrana |
| Sumatran Ground Boa | Squamata | Indonesia | Candoia aspera |
| Sunbeam Snake | Squamata | Tropical forests | Xenopeltis unicolor |
| Suriname Hog-nosed Snake | Squamata | South America | Liophis cobella |