From A Steel Blue Sky

Although common only in Alaska, the Bald Eagle is our national bird.  The heads and tails of immature birds gradually lighten with each molt.  The familiar white head and tail appear only after about five years.  Young birds resemble Golden Eagles, but have larger heads, heavier bills, longer tails, and unfeathered legs.  Bald Eagles feed primarily on fish and thus are most often found near water, but will also eat carrion, rabbits and ducks.  Bald Eagles, 30"-43" long, 78"-96" wingspan, males 8-9 pounds, females 10-14 pounds, mate for life.