. . . . . . . . . "Strymon cestri" . . "Opuntia" . . "Horacio V. Barcenas. 2017. Strymon cestri nectar plant Opuntia. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/6047349> 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." .