NNTRC Snakes

Scientific Name

crotalus oreganus oreganus

Common Name 

Northern Pacific Rattlesnake

Physical Characteristics

Length, 20-47 in. (50-120 cm). The ground color can be brown, grey, black, or yellow with large dark blotches with light edges along the back.

Geographic Range (USA)

From Canadian British Columbia southward into Oregon, western Idaho, and the northern two-thirds of California in the US.

Mapbutton button

scrub areas, prairie, grasslands, chaparral, and forests


Rodents, lizards, and small birds.


Hemorrhagic toxins, resulting in tissue damage and edema.


Once considered a subspecies of the Crotalus viridis complex. Recent molecular analysis suggests it is a separate species and Douglas et al. (2003) has elevated it to full species status. The Northern Pacific Rattlesnake disposition ranges from passive and inoffensive to quite easily provoked.

This page was last updated on: July 20, 2016