@ad39b1fd i think this is a sidewinder based on the little horns it has! nice find!
@cd7fb4c8 Oh, I might have to change that. The tail isn't as dark as the blacktails. I hadn't noticed the horns last night because I was concentrating on holding my phone with one hand, the light with the other, and keeping out of a striking range. Usually, sidewinders are so distinct by the way they move, but this one was moving more like a "regular" snake.
@cd7fb4c8 I think you're totally right. I looked at my other photos of sidewinders. I was trying to keep far enough away and still get a photo while holding the phone and the light so I didn't take a super good look at it. It didn't immediately move like a sidewinder, so it didn't register as one. It was big for a sidewinder! All the others have seen have been dinky.