The Flathead National Forest Facebook page says… This is the time of year to watch for young Bald Eagles, several of which are born in and near Flathead National Forest every year. Most immature Bald Eagles are dark brown mottled with white, with a wingspan of 5 1/2 to 8 feet. At about 5 years they achieve the majestic look of an adult Bald Eagle — white head and tail with dark brown body and wings. Compared to a Golden Eagle in flight, a Bald Eagles has a longer neck that extends to about half the length of its tail. Also, young Bald Eagles tend to have small white blotches on their bellies and wings instead of the distinctive white “wing window” strip of a young Golden Eagle. USFWS photo.