. . . . . . . . . "Bombus ternarius" . . "Calystegia sepium" . . "roy pilcher. 2016. Bombus ternarius nectar plant Calystegia sepium. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/3990852> 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." .