. . . . . . . . . "Carduelis carduelis" . . "Betula" . . "james_ranstead. 2016. Carduelis carduelis associated species with names lookup Betula. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/2780659> 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." .