great basin rattlesnake subspecies of crotalus lutosus. sitting camouflaged in the sun warming on rocks by deer creek reservoir hi

adventure animal arizona atrox basin beautiful beauty blending brown camouflage camouflaged caution close closeup confluentus creek crotalus danger dangerous deer defense defensive eye fangs fauna great herper herpetology herping hiking iconic lutosus morning mountains nature oreganus poison poisonous profile rattle rattlesnake reptile reservoir rocks rocky scales scary sitting skin snake states subspecies sun trail travel united usa utah venom venomous viridis warming wasatch wildlife