Wolfe, D.H, Larsson, L.C., Oldenettel, J.R., Walker, H.A., and Patten, M.A. 2012. Status of populations of the White-tailed Ptarmigan att eh southern edge of its range. In Watson, R.T., Cade, T.J., Fuller, M., Hunt, G., and Potapove, E. (Eds.). Gyrfalcons

• Lagopus leucurus
• white-tailed ptarmigan