- Photograph Available - Taxonomic Comments Available - Taxonomic Comments Since Collins and Taggart (2009)

Family Boidae - Boas - Gray, 1842   Charina - Rubber Boas - Gray, 1849   C. bottae - Northern Rubber Boa - (Blainville, 1835)   C. umbratica - Southern Rubber Boa - Klauber, 1943   Lichanura - Rosy Boas - Cope, 1861   L. orcutti - Desert Rosy Boa - Stejneger, 1889   L. trivirgata - Mexican Rosy Boa - Cope, 1861 Family Colubridae - Harmless Egg-Laying Snakes - Oppel, 1811   Arizona - Glossy Snakes - Kennicott, 1859   A. elegans - Eastern Glossy Snake - Kennicott, 1859 A. e. arenicola - Texas Glossy Snake - Dixon, 1960 A. e. elegans - Kansas Glossy Snake - Kennicott, 1859 A. e. philipi - Painted Desert Glossy Snake - Klauber, 1946   A. occidentalis - Western Glossy Snake - Blanchard, 1924 A. o. candida - Mojave Glossy Snake - Klauber, 1946 A. o. eburnata - Desert Glossy Snake - Klauber, 1946 A. o. noctivaga - Arizona Glossy Snake - Klauber, 1946 A. o. occidentalis - California Glossy Snake - Blanchard, 1924   Bogertophis - Desert Rat Snakes - Dowling & Price, 1988   B. rosaliae - Baja California Rat Snake - (Mocquard, 1899)   B. subocularis - Trans-Pecos Rat Snake - (Brown, 1901) B. s. subocularis - Trans-Pecos Rat Snake - (Brown, 1901)   Cemophora - Scarlet Snake - Cope, 1860   C. coccinea - Scarlet Snake - (Blumenbach, 1788) C. c. coccinea - Florida Scarlet Snake - (Blumenbach, 1788) C. c. copei - Northern Scarlet Snake - Jan, 1863 C. c. lineri - Texas Scarlet Snake - Williams, Brown & Wilson, 1966   Chilomeniscus - Sand Snakes - Cope, 1860   C. stramineus - Western Sand Snake - Cope, 1860   Chionactis - Shovelnose Snakes - Cope, 1860   C. occipitalis - Western Shovelnose Snake - (Hallowell, 1854) C. o. annulata - Colorado Desert Shovelnose Snake - (Baird, 1859) C. o. klauberi - Tucson Shovelnose Snake - (Stickel, 1941) C. o. occipitalis - Mojave Shovelnose Snake - (Hallowell, 1854) C. o. talpina - Nevada Shovelnose Snake - Klauber, 1951   C. palarostris - Sonoran Shovelnose Snake - (Klauber, 1937) C. p. organica - Organ Pipe Shovelnose Snake - Klauber, 1951   Coluber - Racers - Linnaeus, 1758   C. constrictor - Eastern Racer - Linnaeus, 1758 C. c. anthicus - Buttermilk Racer - (Cope, 1862) C. c. constrictor - Northern Black Racer - Linnaeus, 1758 C. c. etheridgei - Tan Racer - Wilson, 1970 C. c. flaviventris - Yellowbelly Racer - Say, 1823 C. c. helvigularis - Brownchin Racer - Auffenberg, 1955 C. c. latrunculus - Blackmask Racer - Wilson, 1970 C. c. oaxaca - Mexican Racer - (Jan, 1863) C. c. paludicola - Everglades Racer - Auffenberg & Babbitt, 1953 C. c. priapus - Southern Black Racer - Dunn & Wood, 1939   C. mormon - Western Racer - Baird & Girard, 1852   Drymarchon - Indigo Snakes - Fitzinger, 1843   D. couperi - Eastern Indigo Snake - (Holbrook, 1842)   D. melanurus - Western Indigo Snake - (Duméril, Bibron & Duméril, 1853) D. m. erebennus - Texas Indigo Snake - (Cope, 1860)   Drymobius - Speckled Racers - Fitzinger, 1843   D. margaritiferus - Speckled Racer - (Schlegel, 1837) D. m. margaritiferus - Northern Speckled Racer - (Schlegel, 1837)   Ficimia - Mexican Hooknose Snake - Gray, 1849   F. streckeri - Mexican Hooknose Snake - Taylor, 1931   Gyalopion - Plateau Hooknose Snakes - Cope, 1860   G. canum - Western Hooknose Snake - (Cope, 1860)   G. quadrangulare - Desert Hooknose Snake - (Günther, 1893)   Lampropeltis - Kingsnakes & Milk Snake - Fitzinger, 1843   L. alterna - Gray-banded Kingsnake - (Brown, 1901)   L. calligaster - Prairie Kingsnake - (Harlan, 1827) L. c. calligaster - Prairie Kingsnake - (Harlan, 1827) L. c. occipitolineata - South Florida Mole Kingsnake - Price, 1987 L. c. rhombomaculata - Mole Kingsnake - (Holbrook, 1840)   L. elapsoides - Scarlet Kingsnake - (Holbrook, 1838)   L. extenuata - Short-tailed Kingsnake - (Brown, 1890)   L. getula - Common Kingsnake - (Linnaeus, 1766) L. g. californiae - California Kingsnake - (Blainville, 1835) L. g. floridana - Florida Kingsnake - Blanchard, 1919 L. g. getula - Eastern Kingsnake - (Linnaeus, 1766) L. g. holbrooki - Speckled Kingsnake - Stejneger, 1902 L. g. meansi - Apalachicola Lowlands Kingsnake - Krysko & Judd, 2006 L. g. nigra - Black Kingsnake - (Yarrow, 1882) L. g. nigrita - Black Desert Kingsnake - Zweifel & Norris, 1955 L. g. splendida - Desert Kingsnake - (Baird & Girard, 1853)   L. pyromelana - Sonoran Mountain Kingsnake - (Cope, 1866) L. p. pyromelana - Arizona Mountain Kingsnake - (Cope, 1866)   L. triangulum - Milk Snake - (Lacépède, 1788) L. t. amaura - Louisiana Milk Snake - Cope, 1860 L. t. annulata - Mexican Milk Snake - Kennicott, 1860 L. t. celaenops - New Mexico Milk Snake - Stejneger, 1903 L. t. gentilis - Central Plains Milk Snake - (Baird & Girard, 1853) L. t. multistriata - Pale Milk Snake - Kennicott, 1860 L. t. syspila - Red Milk Snake - (Cope, 1888) L. t. taylori - Utah Milk Snake - Tanner & Loomis, 1957 L. t. triangulum - Eastern Milk Snake - (Lacépède, 1788)   L. zonata - California Mountain Kingsnake - (Blainville, 1835)   Liochlorophis - Smooth Green Snake - Oldham & Smith, 1991   L. vernalis - Smooth Green Snake - (Harlan, 1827)   Masticophis - Whipsnakes, Striped Racers, & Coachwhips - Baird & Girard, 1853   M. bilineatus - Sonoran Whipsnake - Jan, 1863   M. flagellum - Coachwhip - (Shaw, 1802) M. f. cingulum - Sonoran Coachwhip - Lowe & Woodin, 1954 M. f. flagellum - Eastern Coachwhip - (Shaw, 1802) M. f. lineatulus - Lined Coachwhip - Smith, 1941 M. f. piceus - Red Coachwhip - (Cope, 1892) M. f. ruddocki - San Joaquin Coachwhip - Brattstrom & Warren, 1953 M. f. testaceus - Western Coachwhip - (Say, 1823)   M. fuliginosus - Baja California Coachwhip - (Cope, 1895)   M. lateralis - Striped Racer - (Hallowell, 1853) M. l. euryxanthus - Alameda Striped Racer - (Riemer, 1954) M. l. lateralis - California Striped Racer - (Hallowell, 1853)   M. schotti - Schott's Whipsnake - Baird & Girard, 1853 M. s. ruthveni - Ruthven's Whipsnake - Ortenburger, 1923 M. s. schotti - Schott's Whipsnake - Baird & Girard, 1853   M. taeniatus - Striped Whipsnake - (Hallowell, 1852) M. t. girardi - Central Texas Whipsnake - (Stejneger & Barbour, 1917) M. t. taeniatus - Desert Striped Whipsnake - (Hallowell, 1852)   Mintonius - Fox Snakes - Collins & Taggart (2008)   M. gloydi - Eastern Fox Snake - (Conant, 1940)   M. vulpinus - Western Fox Snake - (Baird & Girard, 1853)   Opheodrys - Rough Green Snake - Fitzinger, 1843   O. aestivus - Rough Green Snake - (Linnaeus, 1766)   Oxybelis - Neotropical Vine Snakes - Wagler, 1830   O. aeneus - Mexican Vine Snake - (Wagler, 1824)   Pantherophis - Corn Snakes & Great Plains Rat Snake - Fitzinger, 1843   P. emoryi - Great Plains Rat Snake - (Baird & Girard, 1853)   P. guttatus - Eastern Corn Snake - (Linnaeus, 1766)   P. slowinskii - Slowinski's Corn Snake - (Burbrink, 2002)   Phyllorhynchus - Leafnose Snakes - Stejneger, 1890   P. browni - Saddled Leafnose Snake - Stejneger, 1890   P. decurtatus - Spotted Leafnose Snake - (Cope, 1868)   Pituophis - Bullsnake, Pine Snakes, & Gopher Snake - Holbrook, 1842   P. catenifer - Gopher Snake - (Blainville, 1835) P. c. affinis - Sonoran Gopher Snake - Hallowell, 1852 P. c. annectens - San Diego Gopher Snake - Baird & Girard, 1853 P. c. catenifer - Pacific Gopher Snake - (Blainville, 1835) P. c. deserticola - Great Basin Gopher Snake - Stejneger, 1893 P. c. pumilis - Santa Cruz Gopher Snake - Klauber, 1946 P. c. sayi - Bullsnake - (Schlegel, 1837)   P. melanoleucus - Eastern Pine Snake - (Daudin, 1803) P. m. lodingi - Black Pine Snake - Blanchard, 1924 P. m. melanoleucus - Northern Pine Snake - (Daudin, 1803) P. m. mugitus - Florida Pine Snake - Barbour, 1921   P. ruthveni - Louisiana Pine Snake - Stull, 1929   Rhinocheilus - Longnose Snake - Baird & Girard, 1853   R. lecontei - Longnose Snake - Baird & Girard, 1853   Salvadora - Patchnose Snakes - Baird & Girard, 1853   S. deserticola - Big Bend Patchnose Snake - Schmidt, 1940   S. grahamiae - Mountain Patchnose Snake - Baird & Girard, 1853 S. g. grahamiae - Mountain Patchnose Snake - Baird & Girard, 1853 S. g. lineata - Texas Patchnose Snake - Schmidt, 1940   S. hexalepis - Western Patchnose Snake - (Cope, 1866) S. h. hexalepis - Desert Patchnose Snake - (Cope, 1866) S. h. mojavensis - Mojave Patchnose Snake - Bogert, 1945 S. h. virgultea - Coast Patchnose Snake - Bogert, 1935   Scotophis - Woodland Rat Snakes - Baird & Girard, 1853   S. alleghaniensis - Eastern Rat Snake - (Holbrook, 1836)   S. bairdi - Baird's Rat Snake - (Yarrow, 1880)   S. obsoletus - Western Rat Snake - (Say, 1823)   S. spiloides - Midland Rat Snake - (Duméril, Bibron & Duméril, 1854)   Senticolis - Mountain Rat Snake - Dowling & Fries, 1987   S. triaspis - Green Rat Snake - (Cope, 1866) S. t. intermedia - Green Rat Snake - (Boettger, 1883)   Sonora - Ground Snakes - Baird & Girard, 1853   S. semiannulata - Ground Snake - Baird & Girard, 1853   Tantilla - Blackhead, Flathead, & Crowned Snakes - Baird & Girard, 1853   T. atriceps - Mexican Blackhead Snake - (Günther, 1895)   T. coronata - Southeastern Crowned Snake - Baird & Girard, 1853   T. cucullata - Big Bend Blackhead Snake - Minton, 1956   T. gracilis - Flathead Snake - Baird & Girard, 1853   T. hobartsmithi - Southwestern Blackhead Snake - Taylor, 1936   T. nigriceps - Plains Blackhead Snake - Kennicott, 1860   T. oolitica - Rim Rock Crowned Snake - Telford, 1966   T. planiceps - Western Blackhead Snake - (Blainville, 1835)   T. relicta - Florida Crowned Snake - Telford, 1966 T. r. neilli - Central Florida Crowned Snake - Telford, 1966 T. r. pamlica - Coastal Dunes Crowned Snake - Telford, 1966 T. r. relicta - Peninsula Crowned Snake - Telford, 1966   T. wilcoxi - Chihuahuan Blackhead Snake - Stejneger, 1902   T. yaquia - Yaqui Blackhead Snake - Smith, 1942   Trimorphodon - Lyre Snakes - Cope, 1861   T. lambda - Sonoran Lyre Snake - Cope, 1886   T. lyrophanes - Baja California Lyre Snake - Cope, 1860   T. vilkinsonii - Chihuahuan Lyre Snake - Cope, 1886 Family Crotalidae - Pitvipers - Oppel, 1811   Agkistrodon - Copperhead & Cottonmouth - Palisot de Beauvois, 1799   A. contortrix - Copperhead - (Linnaeus, 1766) A. c. contortrix - Southern Copperhead - (Linnaeus, 1766) A. c. laticinctus - Broad-banded Copperhead - Gloyd & Conant, 1934 A. c. mokasen - Northern Copperhead - Palisot de Beauvois, 1799 A. c. phaeogaster - Osage Copperhead - Gloyd, 1969 A. c. pictigaster - Trans-Pecos Copperhead - Gloyd & Conant, 1943   A. piscivorus - Cottonmouth - (Lacépède, 1789) A. p. conanti - Florida Cottonmouth - Gloyd, 1969 A. p. leucostoma - Western Cottonmouth - (Troost, 1836) A. p. piscivorus - Eastern Cottonmouth - (Lacépède, 1789)   Crotalus - Rattlesnakes - Linnaeus, 1758   C. abyssus - Grand Canyon Rattlesnake - Klauber, 1930   C. adamanteus - Eastern Diamondback Rattlesnake - Palisot de Beauvois, 1799   C. atrox - Western Diamondback Rattlesnake - Baird & Girard, 1853   C. cerastes - Sidewinder - Hallowell, 1854 C. c. cerastes - Mojave Desert Sidewinder - Hallowell, 1854 C. c. cercobombus - Sonoran Sidewinder - Savage & Cliff, 1953 C. c. laterorepens - Colorado Desert Sidewinder - Klauber, 1944   C. cerberus - Arizona Black Rattlesnake - (Coues, 1875)   C. concolor - Midget Faded Rattlesnake - Woodbury, 1929   C. helleri - Southern Pacific Rattlesnake - Meek, 1905   C. horridus - Timber Rattlesnake - Linnaeus, 1758   C. lepidus - Rock Rattlesnake - (Kennicott, 1861) C. l. klauberi - Banded Rock Rattlesnake - Gloyd, 1936 C. l. lepidus - Mottled Rock Rattlesnake - (Kennicott, 1861)   C. lutosus - Great Basin Rattlesnake - Klauber, 1930   C. mitchellii - Speckled Rattlesnake - (Cope, 1861) C. m. pyrrhus - Southwestern Speckled Rattlesnake - (Cope, 1866)   C. molossus - Blacktail Rattlesnake - Baird & Girard, 1853 C. m. molossus - Blacktail Rattlesnake - Baird & Girard, 1853   C. oreganus - Northern Pacific Rattlesnake - Holbrook, 1840   C. pricei - Twin-spotted Rattlesnake - Van Denburgh, 1895 C. p. pricei - Twin-spotted Rattlesnake - Van Denburgh, 1895   C. ruber - Red Diamond Rattlesnake - Cope, 1892   C. scutulatus - Mohave Rattlesnake - (Kennicott, 1861) C. s. scutulatus - Mohave Rattlesnake - (Kennicott, 1861)   C. stephensi - Panamint Rattlesnake - Klauber, 1930   C. tigris - Tiger Rattlesnake - Kennicott, 1859   C. viridis - Prairie Rattlesnake - (Rafinesque, 1818)   C. willardi - Ridgenose Rattlesnake - Meek, 1905 C. w. obscurus - New Mexico Ridgenose Rattlesnake - Harris, 1974 C. w. willardi - Arizona Ridgenose Rattlesnake - Meek, 1905   Sistrurus - Pigmy Rattlesnake and Massasauga - Garman, 1883   S. catenatus - Massasauga - (Rafinesque, 1818) S. c. catenatus - Eastern Massasauga - (Rafinesque, 1818) S. c. edwardsii - Desert Massasauga - (Baird & Girard, 1853) S. c. tergeminus - Western Massasauga - (Say, 1823)   S. miliarius - Pigmy Rattlesnake - (Linnaeus, 1766) S. m. barbouri - Dusky Pigmy Rattlesnake - Gloyd, 1935 S. m. miliarius - Carolina Pigmy Rattlesnake - (Linnaeus, 1766) S. m. streckeri - Western Pigmy Rattlesnake - Gloyd, 1935 Family Dipsadidae - Rear-Fanged Snakes - Bonaparte, 1838   Carphophis - Worm Snakes - Gervais, 1843   C. amoenus - Eastern Worm Snake - (Say, 1825) C. a. amoenus - Eastern Worm Snake - (Say, 1825) C. a. helenae - Midwest Worm Snake - (Kennicott, 1859)   C. vermis - Western Worm Snake - (Kennicott, 1859)   Coniophanes - Black-striped Snakes - Hallowell, 1860   C. imperialis - Black-striped Snake - (Baird, 1859) C. i. imperialis - Black-striped Snake - (Baird, 1859)   Contia - Sharptail Snake - Baird & Girard, 1853   C. longicaudae - Forest Sharptail Snake - Feldman & Hoyer, 2010   C. tenuis - Common Sharptail Snake - (Baird & Girard, 1852)   Diadophis - Ringneck Snake - Baird & Girard, 1853   D. punctatus - Ringneck Snake - (Linnaeus, 1766) D. p. acricus - Key Ringneck Snake - Paulson, 1968 D. p. amabilis - Pacific Ringneck Snake - Baird & Girard, 1853 D. p. arnyi - Prairie Ringneck Snake - Kennicott, 1859 D. p. edwardsii - Northern Ringneck Snake - (Merrem, 1820) D. p. modestus - San Bernardino - Bocourt, 1866 D. p. occidentalis - Northwestern Ringneck Snake - Blanchard, 1923 D. p. pulchellus - Coralbelly Ringneck Snake - Baird & Girard, 1853 D. p. punctatus - Southern Ringneck Snake - (Linnaeus, 1766) D. p. regalis - Regal Ringneck Snake - Baird & Girard, 1853 D. p. similis - San Diego Ringneck Snake - Blanchard, 1923 D. p. stictogenys - Mississippi Ringneck Snake - Cope, 1860 D. p. vandenburgii - Monterey Ringneck Snake - Blanchard, 1923   Farancia - Mud Snake & Rainbow Snake - Gray, 1842   F. abacura - Mud Snake - (Holbrook, 1836) F. a. abacura - Eastern Mud Snake - (Holbrook, 1836) F. a. reinwardtii - Western Mud Snake - Schlegel, 1837   F. erytrogramma - Rainbow Snake - (Palisot de Beauvois, 1801) F. e. erytrogramma - Rainbow Snake - (Palisot de Beauvois, 1801) F. e. seminola - South Florida Rainbow Snake - Neill, 1964   Heterodon - Hognose Snakes - Latreille, 1801   H. nasicus - Western Hognose Snake - Baird & Girard, 1852 H. n. gloydi - Dusty Hognose Snake - Edgren, 1952 H. n. kennerlyi - Mexican Hognose Snake - Kennicott, 1860 H. n. nasicus - Plains Hognose Snake - Baird & Girard, 1852   H. platirhinos - Eastern Hognose Snake - Latreille, 1801   H. simus - Southern Hognose Snake - (Linnaeus, 1766)   Hypsiglena - Night Snakes - Cope, 1860   H. chlorophaea - Desert Night Snake - Cope, 1860   H. jani - Chihuahuan Night Snake - (Dugès, 1865)   H. ochrorhynchus - Coast Night Snake - Cope, 1860   Leptodeira - Cat-eyed Snakes - Fitzinger, 1843   L. septentrionalis - Northern Cat-eyed Snake - (Kennicott, 1859) L. s. septentrionalis - Northern Cat-eyed Snake - (Kennicott, 1859)   Rhadinaea - Pine Woods Snake - Cope, 1863   R. flavilata - Pine Woods Snake - (Cope, 1871) Family Elapidae - Coral Snakes, Cobras & Kraits - Boie, 1827   Micruroides - Western Coral Snake - Schmidt, 1928   M. euryxanthus - Western Coral Snake - (Kennicott, 1860) M. e. euryxanthus - Arizona Coral Snake - (Kennicott, 1860)   Micrurus - Eastern Coral Snakes - Wagler, 1824   M. fulvius - Eastern Coral Snake - (Linnaeus, 1766)   M. tener - Texas Coral Snake - (Baird & Girard, 1853) M. t. tener - Texas Coral Snake - (Baird & Girard, 1853) Family Hydrophiidae - Sea Snakes & Allies - Fitzinger, 1843   Pelamis - Pelagic Sea Snake - Daudin, 1803   P. platurus - Yellowbelly Sea Snake - (Linnaeus, 1766) Family Leptotyphlopidae - Slender Blind Snakes - Stejneger, 1891   Rena - Blind Snakes - Baird & Girard, 1853   R. dissecta - New Mexico Blind Snake - (Cope, 1896)   R. dulcis - Texas Blind Snake - Baird & Girard, 1853   R. humilis - Western Blind Snake - Baird & Girard, 1853 R. h. cahuilae - Desert Blind Snake - (Klauber, 1931) R. h. humilis - Southwestern Blind Snake - Baird & Girard, 1853 R. h. segrega - Trans-Pecos Blind Snake - (Klauber, 1939) R. h. utahensis - Utah Blind Snake - (Tanner, 1938) Family Natricidae - Harmless Live-Bearing Snakes - Bonaparte, 1840   Clonophis - Kirtland's Snake - Cope, 1889   C. kirtlandii - Kirtland's Snake - (Kennicott, 1856)   Nerodia - Water Snakes & Salt Marsh Snake - Baird & Girard, 1853   N. clarkii - Salt Marsh Snake - (Baird & Girard, 1853) N. c. clarkii - Gulf Salt Marsh Snake - (Baird & Girard, 1853) N. c. compressicauda - Mangrove Salt Marsh Snake - Kennicott, 1860 N. c. taeniata - Atlantic Salt Marsh Snake - (Cope, 1895)   N. cyclopion - Mississippi Green Water Snake - (Duméril, Bibron & Duméril, 1854)   N. erythrogaster - Plainbelly Water Snake - (Forster, 1771) N. e. erythrogaster - Redbelly Water Snake - (Forster, 1771) N. e. flavigaster - Yellowbelly Water Snake - (Conant, 1949) N. e. neglecta - Copperbelly Water Snake - (Conant, 1949) N. e. transversa - Blotched Water Snake - (Hallowell, 1852)   N. fasciata - Southern Water Snake - (Linnaeus, 1766) N. f. confluens - Broad-banded Water Snake - (Blanchard, 1923) N. f. fasciata - Banded Water Snake - (Linnaeus, 1766) N. f. pictiventris - Florida Water Snake - (Cope, 1895)   N. floridana - Florida Green Water Snake - (Goff, 1936)   N. harteri - Brazos Water Snake - (Trapido, 1941)   N. paucimaculata - Concho Water Snake - (Tinkle & Conant, 1961)   N. rhombifer - Diamondback Water Snake - (Hallowell, 1852) N. r. rhombifer - Diamondback Water Snake - (Hallowell, 1852)   N. sipedon - Northern Water Snake - (Linnaeus, 1758) N. s. insularum - Lake Erie Water Snake - (Conant & Clay, 1937) N. s. pleuralis - Midland Water Snake - (Cope, 1892) N. s. sipedon - Northern Water Snake - (Linnaeus, 1758) N. s. williamengelsi - Carolina Water Snake - (Conant & Lazell, 1973)   N. taxispilota - Brown Water Snake - (Holbrook, 1838)   Regina - Crayfish Snakes - Baird & Girard, 1853   R. alleni - Striped Crayfish Snake - (Garman, 1874)   R. grahamii - Graham's Crayfish Snake - Baird & Girard, 1853   R. rigida - Glossy Crayfish Snake - (Say, 1825) R. r. deltae - Delta Crayfish Snake - (Huheey, 1959) R. r. rigida - Glossy Crayfish Snake - (Say, 1825) R. r. sinicola - Gulf Crayfish Snake - (Huheey, 1959)   R. septemvittata - Queen Snake - (Say, 1825)   Seminatrix - Swamp Snake - Cope, 1895   S. pygaea - Black Swamp Snake - (Cope, 1871) S. p. cyclas - South Florida Swamp Snake - Dowling, 1950 S. p. paludis - Carolina Swamp Snake - Dowling, 1950 S. p. pygaea - North Florida Swamp Snake - (Cope, 1871)   Storeria - Brown Snake & Redbelly Snake - Baird & Girard, 1853   S. dekayi - Brown Snake - (Holbrook, 1836) S. d. dekayi - Northern Brown Snake - (Holbrook, 1836) S. d. limnetes - Marsh Brown Snake - Anderson, 1961 S. d. texana - Texas Brown Snake - Trapido, 1944 S. d. victa - Florida Brown Snake - Hay, 1892 S. d. wrightorum - Midland Brown Snake - Trapido, 1944   S. occipitomaculata - Redbelly Snake - (Storer, 1839) S. o. obscura - Florida Redbelly Snake - Trapido, 1944 S. o. occipitomaculata - Northern Redbelly Snake - (Storer, 1839) S. o. pahasapae - Black Hills Redbelly Snake - Smith, 1963   Thamnophis - Garter & Ribbon Snakes - Fitzinger, 1843   T. atratus - Santa Cruz Garter Snake - (Kennicott, 1860) T. a. atratus - Santa Cruz Garter Snake - (Kennicott, 1860) T. a. hydrophilus - Oregon Garter Snake - Fitch, 1936 T. a. zaxanthus - Diablo Garter Snake - Boundy, 1999   T. brachystoma - Shorthead Garter Snake - (Cope, 1892)   T. butleri - Butler's Garter Snake - (Cope, 1889)   T. couchii - Western Aquatic Garter Snake - (Kennicott, 1859)   T. cyrtopsis - Blackneck Garter Snake - (Kennicott, 1860) T. c. cyrtopsis - Western Blackneck Garter Snake - (Kennicott, 1860) T. c. ocellatus - Eastern Blackneck Garter Snake - (Cope, 1880)   T. elegans - Western Terrestrial Garter Snake - (Baird & Girard, 1853) T. e. elegans - Mountain Garter Snake - (Baird & Girard, 1853) T. e. vagrans - Wandering Garter Snake - (Baird & Girard, 1853)   T. eques - Mexican Garter Snake - (Reuss, 1834) T. e. megalops - Northern Mexican Garter Snake - (Kennicott, 1860)   T. gigas - Giant Garter Snake - Fitch, 1940   T. hammondii - Two-striped Garter Snake - (Kennicott, 1860)   T. marcianus - Checkered Garter Snake - (Baird & Girard, 1853) T. m. marcianus - Checkered Garter Snake - (Baird & Girard, 1853)   T. ordinoides - Northwestern Garter Snake - (Baird & Girard, 1852)   T. proximus - Western Ribbon Snake - (Say, 1823) T. p. diabolicus - Arid Land Ribbon Snake - Rossman, 1963 T. p. orarius - Gulf Coast Ribbon Snake - Rossman, 1963 T. p. proximus - Western Ribbon Snake - (Say, 1823) T. p. rubrilineatus - Redstripe Ribbon Snake - Rossman, 1963   T. radix - Plains Garter Snake - (Baird & Girard, 1853)   T. rufipunctatus - Narrowhead Garter Snake - (Cope, 1875)   T. sauritus - Eastern Ribbon Snake - (Linnaeus, 1766) T. s. sackenii - Peninsula Ribbon Snake - (Kennicott, 1859) T. s. sauritus - Eastern Ribbon Snake - (Linnaeus, 1766) T. s. septentrionalis - Northern Ribbon Snake - Rossman, 1963   T. sirtalis - Common Garter Snake - (Linnaeus, 1758) T. s. annectens - Texas Garter Snake - Brown, 1950 T. s. concinnus - Red-Spotted Garter Snake - (Hallowell, 1852) T. s. dorsalis - New Mexico Garter Snake - (Baird & Girard, 1853) T. s. fitchi - Valley Garter Snake - Fox, 1951 T. s. infernalis - California Red-sided Garter Snake - (Blainville, 1835) T. s. pallidulus - Maritime Garter Snake - Allen, 1899 T. s. parietalis - Red-sided Garter Snake - (Say, 1823) T. s. pickeringii - Puget Sound Garter Snake - (Baird & Girard, 1853) T. s. sirtalis - Eastern Garter Snake - (Linnaeus, 1758) T. s. tetrataenia - San Francisco Garter Snake - (Cope 1875)   Tropidoclonion - Lined Snake - Cope, 1860   T. lineatum - Lined Snake - (Hallowell, 1856)   Virginia - Earth Snakes - Baird & Girard, 1853   V. pulchra - Mountain Earth Snake - (Richmond, 1954)   V. striatula - Rough Earth Snake - (Linnaeus, 1766)   V. valeriae - Smooth Earth Snake - Baird & Girard, 1853 V. v. elegans - Western Earth Snake - Kennicott, 1859 V. v. valeriae - Eastern Earth Snake - Baird & Girard, 1853

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