Attributes / relations provided by
♦ 1Predation upon small mammals in shrublands and grasslands of southern South America: ecological correlates and presumable consequences, Fabian M. Jaksic, Revista Chilena de Historia Natural 59: 209-221 (1986)
♦ 2Breeding 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