Attributes / relations provided by
♦ 1Breeding Biology of a Grey Eagle-Buzzard Population in Patagonia, Fernando Hiraldo, José A. Donázar, Olga Ceballos, Alejandro Travaini, Javier Bustamante and Martín Funes, The Wilson Bulletin, Vol. 107, No. 4 (Dec 1995), pp. 675-685
♦ 2Reithrodon auritus, Ulyses F. J. Pardin ̃as and Carlos A. Galliari, MAMMALIAN SPECIES No. 664, pp. 18 (2001)