. . . . . . . . . "Anser albifrons" . . "Branta hutchinsii" . . "bhallberg. 2017. Anser albifrons associated species with names lookup Branta hutchinsii. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/5469319> 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." .