Attributes / relations provided by
♦ 1FOOD HABITS AND NEST CHARACTERISTICS OF BREEDING RAPTORS IN SOUTHWESTERN WYOMING, Patricia A. MacLaren, Stanley H. Anderson, and Douglas E. Runde, Great Basin Naturalist Vol. 48, No. 4 pp. 548-553 (1988)
♦ 2POTAPOV, E. 2011.
Gyrfalcon diet: Spatial and temporal variation In R. T. Watson, T. J. Cade, M. Fuller, G. Hunt, and E. Potapov (Eds.). Gyrfalcons and Ptarmigan in a Changing World. The Peregrine Fund, Boise, Idaho, USA
♦ 3Golden Eagles on the Swedish mountain tundra diet and breeding success in relation to prey fluctuations, Jesper Nyström, Johan Ekenstedt, Anders Angerbjörn, Linda Thulin, Peter Hellström & Love Dalén, Ornis Fennica 83:145152. 2006
♦ 4Exploring the Denali Food Web, ParkWise, National Park Service