VISUAL KEY TO THE SNAKES

OF HARRIS COUNTY, TEXAS

LIST OF SPECIES

VENOMOUS SNAKES

GENUS Agkistrodon

Southern Copperhead - Agkistrodon contortrix contortrix

Western Cottonmouth - Agkistrodon piscivorus leucostoma

GENUS Micrurus

Texas Coral Snake - Micrurus fulvius tener

GENUS Crotalus

Western Diamondback Rattlesnake - Crotalus atrox

Timber Rattlesnake - Crotalus horridus

GENUS Sistrurus

Western PigmyRattlesnake - Sistrurus miliarius streckeri

NON-VENOMOUS SNAKES

GENUS Tantilla

Flat-headed Snake - Tantilla gracilis

GENUS Storeria

Texas Brown Snake - Storeria dekayi texana

Marsh Brown Snake - Storeria dekayi limnetes

GENUS Virginia

Rough Earth Snake - Virginia striatula

GENUS Diadophis

Mississippi Ringneck Snake - Diadophis punctatus stictogenys

GENUS Sonora

Ground Snake - Sonora semiannulata

GENUS Thamnophis

Eastern Garter Snake - Thamnophis sirtalis sirtalis

Western Ribbon Snake - Thamnophis proximus proximus

GENUS Nerodia

Diamondback Water Snake - Nerodia rhombifer rhombifer

Yellowbelly Water Snake - Nerodia erythrogaster flavigaster

Blotched Water Snake - Nerodia erythrogaster transversa

Broad-banded Water Snake - Nerodia fasciata confluens

Mississippi Green Water Snake - Nerodia cyclopion

GENUS Regina

Graham's Crayfish Snake - Regina grahamii

Gulf Crayfish Snake - Regina rigida sinicola

GENUS Farancia

Western Mud Snake - Farancia abacura reinwardtii

GENUS Opheodrys

Rough Green Snake - Opheodrys aestivus

GENUS Liochlorophis

Western Smooth Green Snake - Liochlorophis vernalis

GENUS Masticophis

Eastern Coachwhip - Masticophis flagellum flagellum

Western Coachwhip - Masticophis flagellum testaceus

GENUS Coluber

Buttermilk Racer - Coluber constrictor anthicus

Eastern yellowbelly Racer - Coluber constrictor flaviventris

GENUS Heterodon

Eastern Hognose Snake - Heterodon Platirhinos

Dusty Hognose Snake - Heterodon nasicus gloydi

GENUS Elaphe

Texas Rat Snake - Elaphe obsoleta lindheimeri

Great Plains Rat Snake - Elaphe guttata emoryi

GENUS Lampropeltis

Prairie Kingsnake - Lampropeltis calligaster calligaster

Speckled Kingsnake - Lampropeltis getula holbrooki

Louisiana Milksnake - Lampropeltis triangulum amaura

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