. . . . . . . . . "Danaus plexippus" . . "Brassica nigra" . . "Chris. 2015. Danaus plexippus pollinates Brassica nigra. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/10268655> 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." .