. . . . . . . . . "Crotalus oreganus helleri" . . "Sylvilagus" . . "Sula Vanderplank. 2016. Crotalus oreganus helleri eating Sylvilagus. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/4597040> 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." .