. . . . . . . . . "Ferocactus cylindraceus" . . "Ovis canadensis" . . "Terry Hunefeld. 2017. Ferocactus cylindraceus associated species with names lookup Ovis canadensis. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/5604626> 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." .