Birds of prey have carnivorous habits, and they have specialized anatomical and physiological characteristics that give them great hunting capacity (Sick, 1997). These characteristics vary depending on the lifestyle of the bird (Tully, Dorrestein, & Jones, 2000). The caracara (Caracara plancus) is a predatory bird that belongs to the Daptriidae Family, which belongs in the Falconiform Order (Cubas, Silva, & Catão-Dias, 2014). It is an opportunistic bird that has omnivorous habits (Sick, 1997), feeds mainly on carrion and arthropods, but it also hunts live prey, such as rodents and lagomorphs (Travaini, Donazar, Ceballos, & Hiraldo, 2001). This species inhabits open fields, occurring from Florida to South America (Sick, 1997). The great egret (Ardea alba) is a pelecaniform bird that belongs to Ardeidae Family (Cubas et al., 2014). They have long pelvic limbs and toes, a thin neck and a long and pointed beak (Sick, 1997). Generally, there is no evident sexual dimorphism and there is a distinction in plumage between young and adults (Cubas et al., 2014). Their diet includes fish, insects, mollusks, crustaceans, amphibians and reptiles
