Heterodon nasicus  Keeled scales, not smooth scales.  Curved rostral scale. (looks like a upward curved nose)

Ficimia streckeri  Smooth scales, has a shine to them  Upward curved rostral scale. ( nose)

Crotalus atrox  Diamond pattern on back, small head scales  With a rattle

Sistrurus catenatus  Blotches 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 tener  Red bands touch yellow bands  Bands are complete

Lamporopeltis triangulum  Red band touches black  band and are complete

Nirodia erythrogaster  Has no pattern on belly

Nerodia Rhombifer  Pattern on belly  Chain link pattern on back  Water snake

Nerodia fasciata  Pattern on belly.  bands on back.  Water snake

Opheodrys aestivus  Solid green color  Non fossorial

Masticophis flagellum  Not solid green!!!!  Scales on tail look braided  Coach whip

Coluber constrictor  Solid in color light/dark  Typical tail scale pattern  Divided anal scale  Offten with whitish chin, & green/grey dorsum

Drymarchon corais  Dark in color  Yellowish chin, and sides  Single anal scale  Indigo snake

Leptotyphlops dulcis  Looks like a earthworm with eyes  Looks like a snake  Pinkish in color

Rhamphotyplops braminus  Looks like an earth worm but looks like a snake.  Uni colored, dark blue or black  With light color on chin or cloaca

Storeria dekayi  Keeled scales  May have faint dorsal stripe & lateral pattern

Sonora semiannulata  Smooth scales  small, unicolored  DOES NOT HAVE A DARKER HEAD THAN BODY!!!

Tantilla gracilis  Small size  Smooth scales  Head is slightly darker than its body

Tantilla nigriceps  Small in size  Smooth scales  Head is distinkly darker than its body

Drymobius margaritiferus  Mostly speckled  Speckles that are mainly blue or green

Lampropeltis getula  Mostly speckled  Speckles mainly white and yellow  With dark bloches on top

Coniophanes imperialis  Striped  Dark dorsal stripe

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

Salvadora grahamiae  striped  Light dorsal strpe  Enlarged rostral scale  Pencil thin dark line near belly scales

Thamnophis marcianus  Striped  With a light spot on its head  Distinct checkered pattern  Defined dorsal stripe

Thamnophis proximus  Striped  Spot on its head  Dorsal stripe from head to tail

Elaphe emoryi  Blotched  Bread loaf shaped which means flat on bottom  Spear point on head

Elaphe obsoleta  Bloched  Round in cross section  NO spear point markin

Pituophis catenifer  blotched  Round in cross section  Keeled scales

Leptoderia septentrionalis  Vertically pupil eyes  Large brown bloches on golden background

Hypsiglena torquata  Dark NECK smudge!!  Many dark blotches  Vertical eye pupil

Arizona elegans  Round pupil  No pattern on belly  Known as the “Glossy snake”

Lampropeltis calligaster  Light brown/grey in background color.  With redish brown blotches bordered by black  Smooth scales  Round pupil  Square blotches on belly