Kirtland Air Force Base near Albuquerque, Bernalillo Co., New Mexico, USA. Grassland area on the base (location approximate); captured by C.W. Painter who kindly allowed me to photo it before it was released.
Unit 11 at Bosque del Apache NWR, Socorro Co., New Mexico, USA in an area of open grassland.
Image scanned from a color slide. This is a rather oddly-patterned C. viridis with reduced blotching and a more grayish color than typical Prairie Rattlesnakes I've seen throughout NM. A similar-looking snake was captured in the early 1990s south of here near Truth or Consequences, Sierra Co., NM and is preserved in the University of New Mexico Museum of Southwestern Biology.
Central part of Union County, New Mexico, USA, in open prairie grassland and probably on the Kiowa National Grasslands. Unfortunately my field notes (and recollection) aren't more specific.
Do not have exact GPS location for you guys
This was brought to our office by a local resident. It looks like the food item is a gray squirrel.
Crotalus is a genus of venomous pit vipers found only in the Americas from southern Canada to northern Argentina. The name is derived from the Greek word krotalon, which means "rattle" or "castanet", and refers to the rattle on the end of the tail which makes this group (genera Crotalus and Sistrurus) so distinctive. 32 species are currently recognized.