- 22–27.2 in
- 52.4–55.9 in
- 34.5–73.2 oz
- Ferruginous Rough-leg
- Buse rouileuse (French)
- Aquililla patas asperas (Spanish)
- Before the elimination of bison in the West, nests of the Ferruginous Hawk were often partially constructed of bison bones and wool.
- The Rough-legged Hawk, the Ferruginous Hawk, and the Golden Eagle are the only American hawks to have legs feathered all the way to the toes.
Open country, primarily prairies, plain and badlands, breeding in trees near streams or on steep slopes, sometimes on mounds in open desert.
Rabbits, ground squirrels, and prairie dogs.
- Clutch Size
- 1–8 eggs
- Condition at Hatching
- Helpless and covered in down.
Considered threatened in several states.
- Bechard, M. J., and J. K. Schmutz. 1995. Ferruginous Hawk (Buteo regalis). In The Birds of North America, No. 172 (A. Poole and F. Gill, eds.). The Academy of Natural Sciences, Philadelphia, and The American Ornithologistsâ€™ Union, Washington, D.C.