Colubridae

     1.  Oviparous and Viviparous
     2.  Contains rear-fanged and mildly venomous species
     3.  Contains no known shared derived characteristics 
     4.  Comprises 63% of all snake species

     Arizona elegans - Glossy Snake
          Arizona elegans candida
          Arizona elegans eburnata
          Arizona elegans occidentalis
     Bogertophis - Rat Snakes
          Bogertophis rosaliae
     Chionactis occipitalis - Shovel-nosed Snake
          Chionactis occipitalis annulata
          Chionactis occipitalis occipitalis
          Chionactis occipitalis talpina
     Coluber - Racers
          Coluber constrictor mormon
     Contia - Sharp-tailed Snakes
          Contia tenuis
     Diadophis punctatus - Ring-necked Snake
          Diadophis punctatus amabilis
          Diadophis punctatus modestus
          Diadophis punctatus occidentalis
          Diadophis punctatus pulchellus
          Diadophis punctatus similis
          Diadophis punctatus vandenburghi
     Hypsiglena - Night Snakes
          Hypsiglena torquata
     Lampropeltis getula - Common Kingsnake
          Lampropeltis getula californiae
     Lampropeltis zonata - Mountain Kingsnakes
          Lampropeltis zonata multicincta
          Lampropeltis zonata multifasciata
          Lampropeltis zonata parvirubra
          Lampropeltis zonata pulchra
          Lampropeltis zonata zonata
     Masticophis flagellum - Coachwhips
          Masticophis flagellum fuliginosus
          Masticophis flagellum piceus
          Masticophis flagellum ruddocki
     Masticophis lateralis - Whipsnakes
          Masticophis lateralis euryxanthus
          Masticophis lateralis lateralis
     Masticophis taeniatus - Striped Whipsnake
          Masticophis taeniatus taeniatus
     Phyllorhyncus decurtatus - Spotted Leaf-nosed Snake
          Phyllorhyncus decurtatus perkinsi
     Pituophis catenifer - Gopher Snakes
          Pituophis catenifer affinis
          Pituophis catenifer annectens
          Pituophis catenifer catenifer
          Pituophis catenifer deserticola
     Rhinocheilus lecontei - Long-nosed Snake
          Rhinocheilus lecontei lecontei
     Salvadora hexalepis - Patch-nosed Snakes
          Salvadora hexalepis hexalepis
          Salvadora hexalepis mojavensis
          Salvadora hexalepis virgultea
     Sonora - Ground Snakes
          Sonora semiannulata
     Tantilla - Black-headed Snakes
          Tantilla hobartsmithi
          Tantilla planiceps
     Thamnophis - Garter Snakes
          Thamnophis atratus - Aquatic Garter Snake
               Thamnophis atratus atratus
               Thamnophis atratus hydrophilus
          Thamnophis couchii
          Thamnophis elegans - Western Terrestrial Garter Snake
               Thamnophis elegans elegans
               Thamnophis elegans terrestris
               Thamnophis elegans vagrans
          Thamnophis gigas
          Thamnophis hammondii
          Thamnophis marcianus
          Thamnophis ordinoides
          Thamnophis sirtalis - Common Garter Snake
               Thamnophis sirtalis fitchi
               Thamnophis sirtalis infernalis
               Thamnophis sirtalis tetrataenia
     Trimorphodon - Lyre Snakes
          Trimorphodon biscutatus

• Leptotyphlopidae • Boidae • Viperidae • Colubridae • Elapidae •