Nathan Shepard: Crotalus atrox
Nathan Shepard: Arizona elegans
Nathan Shepard: Crotalus v. viridis
Nathan Shepard: Gyalopion canum
Nathan Shepard: Gyalopion canum
Nathan Shepard: Gyalopion canum
Nathan Shepard: Gyalopion canum
Nathan Shepard: Sistrurus catenatus edwardsii (DOR)
Nathan Shepard: Thamnophis marcianus
Nathan Shepard: Thamnophis marcianus
Nathan Shepard: Crotalus scutulatus
Nathan Shepard: Crotalus scutulatus
Nathan Shepard: Crotalus scutulatus
Nathan Shepard: Crotalus scutulatus
Nathan Shepard: Bufo cognatus
Nathan Shepard: Bufo debilis
Nathan Shepard: Bufo debilis calling (in-situ)
Nathan Shepard: Bufo debilis (in-situ)
Nathan Shepard: Crotalus atrox
Nathan Shepard: Crotalus atrox
Nathan Shepard: Coluber bilineatus
Nathan Shepard: Coluber bilineatus
Nathan Shepard: Crotalus pricei
Nathan Shepard: Crotalus pricei
Nathan Shepard: Crotalus pricei
Nathan Shepard: Crotalus pricei
Nathan Shepard: Crotalus pricei
Nathan Shepard: Trimorphodon lambda
Nathan Shepard: Coleonyx variegatus
Nathan Shepard: Crotalus cerberus