Snakes of the Grand Canyon

I am interested in photographs or slides of snakes observed anywhere in the Grand Canyon region from Glen Canyon Dam to Hoover Dam. (Of course, only take the photos when it is safe and convenient to do so.) An overall body shot from a safe distance would be best.
Helpful Hints:
• There’s a better chance of obtaining photographs if you respect the snakes’ personal space and move slowly around them.
• The important identification features are the type and color of the pattern/bands on tail, back, sides, head.
• If the snake is seen at night, additional lighting (such as a lantern, a few headlamps or flashlights) may allow for an identifiable photograph. At the time of the photograph, please create a data sheet noting the basic information of river mile, side, and date. If the location of the snake is away from the main river corridor, please note the approximate distance from the river, side of river, and river mile.

For example, approximately one mile up the canyon at rm 196.8 l. Provide the best description of the habitat where it was found.
If the opportunity arises, photographs of other reptiles, particularly chuckwallas and Gila monsters, would be an added value to the project. A data sheet should also be filled out for these species.
Please send the photo or slide and accompanying data sheet or specific information to Nikolle Brown, 7779 N. Leonard, Clovis, ca 93611
If you have any questions or comments about this project please feel free to contact me at the above address or at the following e-mail address:
black-catnik@worldnet.att.net.
Nicolle Brown