There was a greenish coloration to its scales and it the diamond pattern was not as pronounced
Phrynosoma cornutum, southeastern side of the West Potrillo Mountains, southwest of Mount Riley and northeast of Guzmans Lookout Mountain, 31.8817 -107.1332, Doña Ana County, New Mexico, 19 Oct 2016.
This slim, smallish rattlesnake was mildly defensive but not aggressive. I can't decide whether it is a 'Green' Prairie Rattler, desert Massassauga, or even a Mojave. Help!