The barn owl returns to the plains, researchers offer it a nest. Bones of common starlings and brown rats were found in the "wads" (regurgitation) left by barn owls in the nests.
Organic material compatible with predation, different from feeding habits in the remains of owls and hawksbills, which are insects, passerines and voles. In an area where the barn owl has lost 50% of its specimens in the last three decades, the objective is to offer the owl a "home"