Heterodon nasicusKeeled scales, not smooth scales.

Curved rostral scale. (looks like a upward curved nose)

Ficimia streckeriSmooth scales , has a shine to them

Upward curved rostral scale. ( nose)

Crotalus atroxDiamond pattern on back, small head scalesWith a rattle

Sistrurus catenatusBlotches

on back, large scales (plates ) on head

With a rattle

Rhinocheilus lecontei

Red may not be as distinct, complete bands on body

Aka. Longnose snake

Micrurus tenerRed bands touch yellow bandsBands are complete

Lamporopeltis triangulum

Red band touches black band and are complete

Nirodia erythrogaster

Has no pattern on belly

Nerodia RhombiferPattern on bellyChain link pattern on backWater snake

Nerodia fasciataPattern on belly. bands on back.Water snake

Opheodrys aestivusSolid green colorNon fossorial

Masticophis flagellum

Not solid green!!!!Scales on tail look braidedCoach whip

Coluber constrictorSolid in color

light/darkTypical tail scale patternDivided anal scaleOfften with whitish chin, & green/grey dorsum

Drymarchon corais Dark in color Yellowish chin , and sides Single anal scaleIndigo snake

Leptotyphlops dulcisLooks like a earthworm with eyesLooks like a snakePinkish in color

Rhamphotyplops braminus

Looks like an earth worm but looks like a snake.Uni colored , dark blue or blackWith light color on chin or cloaca

Storeria dekayiKeeled scales May have faint dorsal stripe & lateral pattern

Sonora semiannulata Smooth

scales small,

unicolored DOES

NOT HAVE A DARKER HEAD THAN BODY!!!

Tantilla gracilisSmall sizeSmooth scalesHead is slightly darker than its body

Tantilla nigricepsSmall in sizeSmooth scalesHead is distinkly darker than its body

Drymobius margaritiferus

Mostly speckledSpeckles that are mainly blue or green

Lampropeltis getulaMostly

speckledSpeckles mainly white and yellowWith dark bloches on top

Coniophanes imperialis

StripedDark dorsal stripe

Masticophis schotti striped

no dorsal stripe but there are stripes on its side which may be a bit light

Salvadora grahamiaestriped

Light dorsal strpeEnlarged rostral scalePencil thin dark line near belly scales

Thamnophis marcianusStripedWith a light spot on its headDistinct checkered patternDefined dorsal stripe

Thamnophis proximusStriped

Spot on its headDorsal stripe from head to tail

Elaphe emoryiBlotchedBread loaf shaped which means flat on bottomSpear point on head

Elaphe obsoletaBlochedRound in cross sectionNO spear point markin

Pituophis cateniferblotche

dRound in cross sectionKeeled scales

Leptoderia septentrionalisVertically pupil eyesLarge brown bloches on golden background

Hypsiglena torquataDark

NECK smudge!!Many dark blotchesVertical eye pupil

Arizona elegansRound pupilNo pattern on bellyKnown as the “Glossy snake”

Lampropeltis calligaster

Light brown/grey in background color.With redish brown blotches bordered by blackSmooth scalesRound pupilSquare blotches on belly