These little serpentine jewels were the species I came across most often crossing the roads at night in a week and a half in Borrego Springs. They would move across the road in a leisurely way until they became aware of my presence, at which point they would start thrashing like mad, moving rapidly in an S-shaped pattern. When they got off the road, they would typically start burrowing into the sand immediately, and I had to take fast action to prevent them from escaping before I could get any photos.

Most of the shovel-noses were the three-colored type as pictured in the first two photos above. But occasionally I'd find one that had almost none of the red color, making them look like a different species entirely, as shown in the third photo above.

Here's one more little beauty from the next evening.

And another from the evening after that. Their bright colors made these snakes really visible against the road or sand, but once they started their high-speed slithering the colors washed together and they seemed to vanish almost instantly.