The largest nestling eats first. Dominant, it may even kill its smallest sibling. After six or seven weeks the juveniles feed themselves and show considerable aggression toward the parents. Males can fly at about 78 days and females a few days later. The timing of the breeding cycle depends on where the nest is.
Northern populations breed later and have a shorter breeding season.
Voice - Shrill, high pitched, and twittering are common descriptions used for bald eagle vocalizations. Eagles do not have vocal cords. Sound is produced in the syrinx, a bony chamber located where the trachea divides to go to the lungs. Bald eagle calls may be a way of reinforcing the bond between the male and female, and to warn other eagles and predators that an area is defended. The feathers weigh twice that much.