Spatial ecology -- Movements, migrations, and mechanisms : a review of radiotelemetry studies of prairie (Crotalus viridis viridis) and western (Crotalus oreganus) rattlesnakes / Dennis Jørgensen, C.

Pacific rattlesnake (Crotalus oreganus) in Utah in 2019. Credit: Don F Becker, Public Domain (CC0 1.0) Pacific rattlesnake (Crotalus oreganus) in Utah in 2019. Credit: Don F Becker, Public Domain ...

Starting each spring, Southern Pacific rattlesnakes (Crotalus oreganus helleri), the most common species in the L.A. area, come out of hibernation to mate. It’s the time of year you’re most ...

FAYETTEVILLE, Ark., March 4 (UPI) --Biologists have identified and named six new species of rattlesnake in the western United States. All six species had been previously identified as subspecies ...

Populations of the great basin rattlesnake (Crotalus oreganus lutosus) are currently in peril due to development, poaching and climate change.

The western rattlesnake (Crotalus oreganus) is one of three species of rattlesnake found in Canada, and the only one in B.C., although they also live as far south as Baja California.

The research team took venom and blood samples from northern Pacific rattlesnakes (Crotalus oreganus) and California ground squirrels (Otospermophilus beecheyi) found in 12 spots in California.

Introducing Crotalus oreganus abyssus -- the Grand Canyon pink rattlesnake. Experts say if you see one of these extremely venomous reptiles, you should leave the area immediately.

5. Washington. There are around dozen snake species in Washington, all of them being non-poisonous except the northern pacific rattlesnake (Crotalus oreganus oreganus).