In golf, an eagle is a score that is two strokes under par for a given hole). For example, if a golfer completes a par-4 hole in just two strokes, or a par-5 hole in three strokes, they have achieved an eagle. The term "eagle" is thought to have originated in the United States in the early 1900s as a natural progression from the term "birdie". Eagles are relatively rare in golf and require excellent golf ball maneuvering skills. They most commonly occur on par-5 holes, but can also occur on short par-4 holes. A hole in one on a par-three hole also results in an eagle).