Geographical distribution of Nelson's sparrow.     Breeding  Migration  Nonbreeding
Shriver, W. G., T. P. Hodgman, and A. R. Hanson (2011). Nelson's Sparrow (Ammodramus nelsoni), version 2.0. In The Birds of North America (A. F. Poole, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. Retrieved from Birds of North America: https://birdsna-org.acces.bibl.ulaval.ca/Species-Account/bna/species/nstspa
Cephas