This one was venturing out onto the road, head and neck held high ("periscoping"), when Matt Cage, Andrew DuBois, and I all spotted it at about the same time as we drove past. Matt slammed on the brakes, and we all jumped out and ran back to try to locate it. It had turned tail and disappeared into the roadside vegetation. We searched for five or ten minutes to no avail, and were on the verge of giving up when another carful of our herping buddies pulled up. They got out to join the search, and within about thirty seconds eagle-eyed Gerrit Jan Verspui spotted it up in a twiggy bush.
We captured the snake and brought it back to our lodging for photos the next day (and then released it back where it was caught).
- Bartlett, R. D., Tennant, A. 2000. Snakes of North America, Western Region
- Brennan, T. C. and Holycross, A. T. 2006. A Field Guide to Amphibians and Reptiles in Arizona
- Crother, B. I. (ed.) 2017. Scientific and Standard English Names of Amphibians and Reptiles of North America North of Mexico, with Comments Regarding Confidence in Our Understanding, Eighth Edition
- Heimes, P. 2016. Snakes of Mexico
- Rorabaugh, J.C., Lemos-Espinal, J.A. 2016. A Field Guide to the Amphibians and Reptiles of Sonora, Mexico
- Stebbins, R. C. 2003. Peterson Field Guide to Western Reptiles and Amphibians, Third Edition