. . . . . . . . . "Euphydryas chalcedona" . . "Marrubium vulgare" . . "deejay. 2015. Euphydryas chalcedona eating Marrubium vulgare. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/1415138> 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." .