This superb Crotalus viridis, a.k.a. the prairie rattlesnake crawled up into the "backyard" of our camp in Philmont, New Mexico. It's almost certain she was looking for one of the dozens of "mini-bears*" that follow the campers everywhere they go, getting fat on spilled sunflower seeds, peanuts, granola chunks, etc. This snake is obviously exceptionally well fed.
*mini-bears is Philmont slang for any of various squirrels, chipmunks, ground squirrels that scavange around camp areas.