. . . . . . . . . "Crotalus oreganus helleri" . . "Phrynosomatidae" . . "jessicav371. 2017. Crotalus oreganus helleri associated species with names lookup Phrynosomatidae. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/7744209> on 05 Apr 2018." . . . . "http://iNaturalist.org is a place where you can record what you see in nature, meet other nature lovers, and learn about the natural world." .