heterodont
adder
sand viper
coffee snake
death adder
Carphophis amoenus
worm snake
roughtail
thunder snake
Potamophis striatula
Haldea striatula
eastern ground snake
pine snake
lyre snake
water moccasin
uropeltoid
water adder
natricine
sand snake
pilot snake
Jamaican blind snake
queen snake
natricid
Sonoran whipsnake
Masticophis bilineatus
black snake
carpet snake
night snake
macrostomatan
Natrix sipedon
Nerodia sipedon
common water snake
banded water snake
sibynophiid
colubrine
xenodermatid
chicken snake
Storeria occipitamaculata
pseudoxenodontid
red-bellied snake
pipe snake
pythonoid
opisthoglyph
russellophiid
amphiesmal
beadsnake
xenopeltid
xenodontine
Big Bend patchnose snake
blue-bellied black snake