. . . . . . . . . "Bombus melanopygus" . . "Hesperis matronalis" . . "David Badke. 2017. Bombus melanopygus interaction->visited flower of Hesperis matronalis. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/6667705> 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." .