Its wingspan is about 170 cm, and is thinner and legs and tail longer than the authentic eagles. In the first year of life they have a dark brown back and a light or dark rust brown belly. In flight, a longitudinal stripe can be seen on the undersides of the wings. Adult birds always remain in mountainous areas with growing trees or lowland in desert or semi-desert climates. Young birds move, practically, in all directions, even within the continent. From the biological point of view of nesting, the Bonelli’s eagle behaves like a true eagle. The pair owns within its territory, they never leave, several nests that over the years used successively. Nests are normal in rocks, but also in trees. While the female begins to incubate the two eggs in February or March, and when it gives warmth to the little ones, the male is responsible for carrying the food to the nest. Only after four weeks are the children left alone in the nest all day. In June they take the emancipation flight. The nest is tidied every day, while incubation lasts, through the provision of tender twigs. It feeds mainly on birds, but also eats reptiles and mammals up to the size of the hare.