. . . . . . . . . "Branta canadensis" . . "Cygnus atratus" . . "Colin Meurk. 2017. Branta canadensis second associated species with names lookup Cygnus atratus. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/6137855> 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." .