Geographical distribution of Chestnut-collared longspur.     Breeding  Migration  Nonbreeding
Bleho, B., K. Ellison, D. P. Hill, and L. K. Gould (2015). Chestnut-collared Longspur (Calcarius ornatus), version 2.0. In The Birds of North America (P. G. Rodewald, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi-org.acces.bibl.ulaval.ca/10.2173/bna.288
Cephas