New Mexico Ridgenosed Rattlesnake (Crotalus willardi obscurus) from a survey several years ago.

New Mexico Ridgenosed Rattlesnake (Crotalus willardi obscurus) from a survey several years ago.

New Mexico Ridgenosed Rattlesnake, Crotalus willardi obscurus. This adult was found in high-elevation woodland in northern Mexico.

New Mexico Ridge-nosed Rattlesnake, Crotalus willardi obscurus

A New Mexico Ridgenosed Rattlesnake (Crotalus willardi obscurus). This federally protected rattlesnake ranges into Arizona, but only a dwindling population remains.

An adult New Mexico Ridgenosed Rattlesnake from a few years back. Within the United States, climate change is quickly transforming its remaining habitat into hot, dry desert mountains under constant threat of fire.
