Chaco Eagle consumes small to medium sized prey, which they have either killed themselves or found dead. Their diet primarily consists of mammals, especially armadillos (Zaedyus, Chaetophractus) and skunks (Conepatus) (Maceda 2002, Lobos et al. 2011). Other mammalian prey include opossums and rodents (Collar et al. 1992). Prey usually is captured live, but Chaco Eagle also has been observed feeding on the carcasses of deer (Blastocercos dichotomus), sheep, and of a road-killed fox (Cerdocyon) (Maceda 2007). Of secondary importance are reptiles, although no class of reptiles predominates in the diet; reptile prey includes lizards (Tupinambis), snakes (including Philodryas and Bothrops), and turtles (including Geochelone) (Robbins et al. 1999, Bellocq et al. 2002, Lobos et al. 2011). More rarely taken prey include birds (tinamous, including Nothoprocta) (Collar et al. 1992, Maceda et al. 2003) and insects (Maceda et al. 2003).