. . . . . . . . . "Castor canadensis" . . "Betula populifolia" . . "Charlie Hohn. 2017. Castor canadensis interaction->herbivore of Betula populifolia. iNaturalist.org. Accessed at <https://www.inaturalist.org/observations/6162852> 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." .