Bald eagles are found in Yellowstone throughout the year. You are however more likely to spot them in the winter. This fellow was looking for dinner along the Firehole River. The Firehole River provides an excellent source of food for eagles during Yellowstone's harsh winter and is a great location to watch eagles feed.
The plumage of an adult Bald Eagle is evenly brown with a white head and tail. The plumage of the immature is brown, speckled with white until the fifth (rarely fourth, very rarely third) year, when it reaches sexual maturity.