Northern Prairie Wildlife Research Center
The adult bald eagle with its dark body and white head and tail, is an unmistakable bird.
Immature bald eagles show a whiteline on the underwing coverts. The body is dark but usually has irregular white mottling in the feathers until close to adulthood.
Immature golden eagles have dark bodies with a white patch in the wing feathers and white at the base of the tail.
The adult golden eagle is solid dark brown with a golden nape of the neck and faint bars in the tail.