Attributes / relations provided by
♦ ¹del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.
♦ ²SPECIES ASSESSMENT FOR BAIRD’S SPARROW (AMMODRAMUS BAIRDII) IN WYOMING, ROBERT LUCE AND DOUG KEINATH, United States Department of the Interior, Bureau of Land Management, December 2003