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VAPAGuide: Venomous & Poisonous Animals

Country: Utah, Colorado

Distribution of Terrestrial Snakes in North America

Occurrences in
NW	the Northwest
N	the North
NE	the Northeast
W	the West
C	central areas
E	the East
SW	the Southwest
S	the South
SE	the Southeast
X	most areas
?	unclear

Literature on the distribution

Pit Vipers

Crotalus spp. (without Crotalus durissus sspp.), Rattlesnakes

Crotalus cerastes	SW	Utah only
Crotalus concolor	X	Eastern Utah, Western Colorado
Crotalus lutosus	W	Western Utah
Crotalus scutulatus	SW	Utah only
Crotalus viridis	X	Colorado and SE Utah

Sistrurus spp., Pygmy rattlesnake and Massasauga

Sistrurus catenatus

E

Colorado only