. . . . . . . . . "Colias croceus" . . "Cirsium italicum" . . "Kostas Zontanos. 2016. Colias croceus nectar plant Cirsium italicum. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/9212135> 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." .