. . . . . . . . . "Eristalis transversa" . . "Rudbeckia" . . "christine123. 2017. Eristalis transversa nectar plant Rudbeckia. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/7487410> 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." .