Of these snake hauls, about 95% of the snakes the sanctuary picks up are Western Diamondbacks. "These other ones are kind of rare, so you'd have to be up against a rocky mountain to have them in ...

Researchers tracked the young male for more than 500 miles, where it then took up residence in Rocky Mountain National Park. The tracker showed M-56's last known location was in Colorado in 2012.

This elusive species prefers canyons and rocky mountain areas in Clark County near the Colorado River. The snake also has diamond markings, but they are less distinct because of its speckled pattern.