Eagles are large birds that can live up to 50 years in captivity or 15-20 years in the wild. They mate for life and the female lays 2-3 eggs which both parents incubate for 35 days. Eagles have keen eyesight, long broad wings adapted for flight, and sharp talons. They do not have vocal cords but can make sounds through their airways. The male is smaller than the female and brings branches to the nest during incubation.