. . . . . . . . . "Buphagus erythrorhynchus" . . "Ceratotherium simum" . . "Paul Tavares. 2008. Buphagus erythrorhynchus other species in group Ceratotherium simum. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/9000808> 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." .