. . . . . . . . . "Bombus ruderatus" . . "Trifolium pratense" . . "Tony Wills. 2013. Bombus ruderatus associated species with names lookup Trifolium pratense. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/1086084> 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." .