Geographical distribution of Henslow's sparrow.     Breeding  Nonbreeding
Herkert, J. R., P. D. Vickery, and D. E. Kroodsma (2002). Henslow's Sparrow (Ammodramus henslowii), version 2.0. In The Birds of North America (A. F. Poole and F. B. Gill, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi-org.acces.bibl.ulaval.ca/10.2173/bna.672
Cephas