Stock photo of a Baby Eagle. This Baby Eagle was almost fearless of us, probably out of ignorance. This Baby Eagle appeared bigger than the adults because of the longer flight feathers which are useful for stablizing the younger birds while learning to fly. Once this baby eagle reaches about the age of 5 years old, he will lose the mottled brown and white feathers and they will be replaced by the familar adult feathers of black with a white head.