. . . . . . . . . "Osmia cornuta" . . "Othocallis siberica" . . "Jakob Fahr. 2016. Osmia cornuta nectar plant Othocallis siberica. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/2832571> 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." .