. . . . . . . . . "Celastrina echo" . . "Achillea millefolium" . . "Henry (Hank) Fabian. 2015. Celastrina echo eating Achillea millefolium. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/1564349> 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." .