Avifaunal surveys of the Upper Apurímac River Valley, Ayacucho and Cuzco Departments, Peru: New distributional records and biogeographic, taxonomic, and conservation implications

Peter A. Hosner^*, Michael J. Andersen, Mark B. Robbins, Abraham Urbay-Tello, Luis Cueto-Aparicio, Karen Verde-Guerra, Luis A. Sánchez-González, Adolfo G. Navarro-Sigüenza, Roger L. Boyd, Jano Núñez, Jorge Tiravanti, Mariela Combe, Hannah L. Owens, A. Townsend Peterson