- 18.1–23.2 in
- 40.6–48.8 in
- 18.2–57.5 oz
- Bay-winged Hawk (English)
- Buse de Harris (French)
- Peuco castellano (Spanish)
- The Harris's Hawk nests in social units that vary from an adult pair to as many as seven individuals, including both adults and immatures.
- Although most North American Harris's Hawks nest in spring (March through June), some females will lay second and even third clutches after their first breeding attempt fails or succeeds. Eggs or young have been recorded in every month of the year.
- Cooperatively hunting groups of Harris's Hawks are more successful at capturing prey than individuals hunting alone. Groups of five hawks are the most successful.
Arid lowland scrub, arid montane scrub, tropical deciduous forest, low seasonally wet grassland, recently in some suburbs of desert cities.
- Condition at Hatching
- Helpless and covered in down.
Declining in the United States.
- Bednarz, J. C. 1995. Harris' Hawk (Parabuteo unicinctus). In The Birds of North America, No. 146 (A. Poole and F. Gill, eds.). The Academy of Natural Sciences, Philadelphia, and The American Ornithologistsâ€™ Union, Washington, D.C.