sentences:  The full adult plumage is attained at 5–6 years of age but some subadults are already breeding before this.In flight, the eastern imperial eagle is a large raptor that has for an "Aquila" a very projecting neck and "huge" head and bill.The long wings may appear fairly broad when compared to other, smaller raptors, but are relatively narrow with even parallel edges when compared to other "Aquila" eagles.