Need Help in ID'ing This Rattler Please

So, here's the word from our nice Fish & Wildlife guy. We have both subspecies since we're on the river:

Hi,

There is only one species of rattlesnake in Oregon; the western
rattlesnake. Within that species we have two sub-species; (1)northern pacific rattlesnake (Crotalus viridis oreganus), and the great basin rattlesnake (Crotalus viridis lutosus). Your snake is a good looking northern pacific rattlesnake. It has a cool tinge of green in the background color. Not all oreganus have that.
Great basin's have a lighter background color and wider spacing between the back markings, or diamonds as some people call them.
In the Spray area you could have both sub-species but oreganus is more likely north of the John day River and lutosus more likely to the south.

Hope that helps. Call if you have more questions.

Simon

Simon Wray
ODFW/ODOT Coordinator

Gotta love Fish and Wildlife, they’re a useful resource :D