Colubridae Advanced Snakes
Species I've seen:
Arizona elegans
Glossy Snake
Atractus major
Big Ground Snake
Boiga irregularis
Eastern Brown Tree Snake
Carphophis amoenus
Common Wormsnake
Chilomeniscus stramineus
Variable Sandsnake
Chionactis occipitalis
Western Shovel-nosed Snake
Chironius exoletus
Common Whipsnake
Chironius fuscus
Olive Whipsnake
Coluber bilineatus
Sonoran Whipsnake
Coluber constrictor
North American Racer
Coluber lateralis
Striped Racer
Coluber taeniatus
Striped Whipsnake
Contia tenuis
Sharp-tailed Snake
Dendrelaphis pictus
Gmelin's Bronzeback
Dendrelaphis punctulata
Green Tree Snake
Dendrophidion dendrophis
Tawny Forest Racer
Diadophis punctatus
Ring-necked Snake
Dipsadoboa unicolor
Günther's Green Tree Snake
Dipsas catesbyi
Ornate Snail-eating Snake
Dipsas indica
Big-headed Snail-eating Snake
Drepanoides anomalus
Amazon Egg-eating Snake
Dromicodryas bernieri
Bernier's Striped Snake
Drymarchon corais
Yellow-tailed Indigo Snake
Drymarchon melanurus
Central American Indigo Snake
Drymoluber dichrous
Common Glossy Racer
Farancia abacura
Red-bellied Mudsnake
Helicops angulatus
Banded South American Water Snake
Heterodon kennerlyi
Mexican Hog-nosed Snake
Hypsiglena chlorophaea
Desert Nightsnake
Hypsiglena jani
Chihuahuan Nightsnake
Hypsiglena ochrorhyncha
Coast Nightsnake
Imantodes cenchoa
Common Blunt-headed Tree Snake
Imantodes lentiferus
Amazon Blunt-headed Tree Snake
Ithycyphus perineti
Perinet Night Snake
Lampropeltis californiae
California Kingsnake
Lampropeltis getula
Eastern Kingsnake
Lampropeltis splendida
Desert Kingsnake
Lampropeltis zonata
California Mountain Kingsnake
Leioheterodon madagascariensis
Madagascar Hog-nosed Snake
Liophidium torquatum
White-lipped Smooth Snake
Liophis typhlus
Velvety Swamp Snake
Liopholidophis rhadinaea
Slender Smooth Snake
Lycodryas pseudogranuliceps
Ampijoroa Tree Snake
Madagascarophis colubrinus
Malagasy Cat-eyed Snake
Mastigodryas melanolomus
Salmon-bellied Racer
Mimophis mahfalensis
Common Big-eyed Snake
Nerodia clarkii
Saltmarsh Watersnake
Nerodia erythrogaster
Plain-bellied Watersnake
Nerodia fasciata
Southern Watersnake
Nerodia floridana
Florida Green Watersnake
Nerodia rhombifer
Diamond-backed Watersnake
Nerodia sipedon
Northern Watersnake
Nerodia taxispilota
Brown Watersnake
Opheodrys aestivus
Rough Greensnake
Oxyrhopus formosus
Yellow-headed Calico Snake
Oxyrhopus petolarius
Banded Calico Snake
Oxyrhopus vanidicus
no known English name
Pantherophis emoryi
Great Plains Ratsnake
Philodryas argentea
Green-striped Vine Snake
Phrynonax poecilonotus
Common Bird Snake
Phyllorhynchus decurtatus
Spotted Leaf-nosed Snake
Pliocercus euryzonus
Black Halloween Snake
Pseudoboa coronata
Crowned False Boa
Rhinocheilus lecontei
Long-nosed Snake
Salvadora hexalepis
Western Patch-nosed Snake
Sibon nebulatus
Cloudy Snail-eating Snake
Spilotes pullatus
Tropical Rat Snake
Storeria victa
Florida Brownsnake
Taeniophallus brevirostris
Short-nosed Leaf-litter Snake
Tantilla gracilis
Flat-headed Snake
Tantilla hobartsmithi
Smith's Black-headed Snake
Tantilla planiceps
Western Black-headed Snake
Thamnophis atratus
Aquatic Gartersnake
Thamnophis couchii
Sierra Gartersnake
Thamnophis cyrtopsis
Black-necked Gartersnake
Thamnophis elegans
Terrestrial Gartersnake
Thamnophis gigas
Giant Gartersnake
Thamnophis hammondii
Two-striped Gartersnake
Thamnophis marcianus
Checkered Gartersnake
Thamnophis ordinoides
Northwestern Gartersnake
Thamnophis proximus
Western Ribbonsnake
Thamnophis sauritus
Eastern Ribbonsnake
Thamnophis sirtalis
Common Gartersnake
Thamnosophis infrasignatus
Forest Water Snake
Thamnosophis lateralis
Lateral Water Snake
Trimorphodon lambda
Sonoran Lyresnake
Trimorphodon lyrophanes
California Lyresnake
Xenopholis scalaris
Wucherer's Ground Snake