Geographical distribution of Nelson's sparrow.     Breeding  Migration  Nonbreeding
Lowther, P. E. (2005). LeConte's Sparrow (Ammodramus leconteii), version 2.0. In The Birds of North America (A. F. Poole, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi-org.acces.bibl.ulaval.ca/10.2173/bna.224
Cephas