. . . . . . . . . "Bombus perplexus" . . "Rhododendron" . . "Randy Mitchell. 2017. Bombus perplexus nectar / pollen delivering plant Rhododendron. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/5754781> 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." .