Geographical distribution of Ross's goose.   Breeding  Migration  Nonbreeding
Jónsson, J. E., J. P. Ryder and R. T. Alisauskas. 2013. Ross's Goose (Anser rossii), version 2.0. In The Birds of North America (A. F. Poole, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. https://birdsna.org
Cephas