Animalia > Chordata > Aves > Accipitriformes > Accipitridae > Buteo > Buteo regalis

Buteo regalis (Ferruginous Hawk)

Language: Spanish

Wikipedia Abstract

The ferruginous hawk (ferruginous = from Latin ferrum – iron, ferrugin-, iron rust, iron-rust color – reddish-brown), Buteo regalis (Latin, royal hawk), is a large bird of prey and belongs to the broad-winged buteo hawks. An old colloquial name is ferrugineous rough-leg, due to its similarity to the closely related rough-legged hawk (B. lagopus). This species is a large, broad-winged hawk of the open, arid grasslands, prairie and shrub steppe country; it is endemic to the interior parts of North America. It is used as a falconry bird in its native range.
View Wikipedia Record: Buteo regalis

EDGE Analysis

Uniqueness Scale: Similiar (0) 
 Unique (100)
Uniqueness & Vulnerability Scale: Similiar & Secure (0) 
 Unique & Vulnerable (100)
ED Score: 2.95696
EDGE Score: 1.37548


Adult Weight [1]  3.239 lbs (1.469 kg)
Birth Weight [3]  52 grams
Female Weight [5]  3.915 lbs (1.776 kg)
Male Weight [5]  2.564 lbs (1.163 kg)
Weight Dimorphism [5]  52.7 %
Breeding Habitat [2]  Temperate grasslands, Agricultural
Wintering Geography [2]  Western U.S./Mexico
Wintering Habitat [2]  Temperate grasslands, Chihuahuan grasslands, Agricultural
Diet [4]  Carnivore (Vertebrates)
Diet - Endothermic [4]  100 %
Forages - Ground [4]  100 %
Clutch Size [6]  4
Clutches / Year [3]  1
Fledging [1]  46 days
Global Population (2017 est.) [2]  110,000
Incubation [3]  32 days
Mating Display [7]  Acrobatic aerial display
Maximum Longevity [3]  24 years
Migration [8]  Intracontinental
Snout to Vent Length [1]  23 inches (58 cm)
Wing Span [9]  4.69 feet (1.43 m)
Female Maturity [3]  2 years
Male Maturity [3]  2 years


Protected Areas

Biodiversity Hotspots

Name Location Endemic Species Website
California Floristic Province Mexico, United States No
Madrean Pine-Oak Woodlands Mexico, United States No

Prey / Diet

Prey / Diet Overlap

Institutions (Zoos, etc.)

Range Map


North America;

External References



Attributes / relations provided by
1Nathan P. Myhrvold, Elita Baldridge, Benjamin Chan, Dhileep Sivam, Daniel L. Freeman, and S. K. Morgan Ernest. 2015. An amniote life-history database to perform comparative analyses with birds, mammals, and reptiles. Ecology 96:3109
2Partners in Flight Avian Conservation Assessment Database, version 2017. Accessed on January 2018.
3de Magalhaes, J. P., and Costa, J. (2009) A database of vertebrate longevity records and their relation to other life-history traits. Journal of Evolutionary Biology 22(8):1770-1774
4Hamish Wilman, Jonathan Belmaker, Jennifer Simpson, Carolina de la Rosa, Marcelo M. Rivadeneira, and Walter Jetz. 2014. EltonTraits 1.0: Species-level foraging attributes of the world's birds and mammals. Ecology 95:2027
5Bechard, M. J., and J. K. Schmutz. 1995. Ferruginous Hawk (Buteo regalis). In A. Poole and F. Gill, editors. The Birds of North America, No. 172. The Academy of Natural Sciences, Philadelphia, Pennsylvania; The American Ornithologists' Union, Washington, D.C. 20 pages.
6Jetz W, Sekercioglu CH, Böhning-Gaese K (2008) The Worldwide Variation in Avian Clutch Size across Species and Space PLoS Biol 6(12): e303. doi:10.1371/journal.pbio.0060303
7Terje Lislevand, Jordi Figuerola, and Tamás Székely. 2007. Avian body sizes in relation to fecundity, mating system, display behavior, and resource sharing. Ecology 88:1605
8Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey. 2006. The Animal Diversity Web (online). Accessed February 01, 2010 at
9del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.
10Jorrit H. Poelen, James D. Simons and Chris J. Mungall. (2014). Global Biotic Interactions: An open infrastructure to share and analyze species-interaction datasets. Ecological Informatics.
11SPECIES ASSESSMENT FOR PYGMY RABBIT (BRACHYLAGUS IDAHOENSIS) IN WYOMING, DOUGLAS A. KEINATH AND MATTHEW MCGEE, United States Department of the Interior Bureau of Land Management Wyoming State Office Cheyenne, Wyoming (2004)
12FOOD HABITS AND NEST CHARACTERISTICS OF BREEDING RAPTORS IN SOUTHWESTERN WYOMING, Patricia A. MacLaren, Stanley H. Anderson, and Douglas E. Runde, Great Basin Naturalist Vol. 48, No. 4 pp. 548-553 (1988)
13Geomys bursarius (Rodentia: Geomyidae), MATTHEW B. CONNIOR, MAMMALIAN SPECIES 43(879):104–117 (2011)
14Lepus californicus, Troy L. Best, MAMMALIAN SPECIES No. 530, pp. 1-10 (1996)
16Sciurus niger, John L. Koprowski, MAMMALIAN SPECIES No. 479, pp. 1-9 (1994)
17Spermophilus townsendii, Eric A. Rickart, MAMMALIAN SPECIES No. 268, pp. 1-6 (1987)
18SPECIES ASSESSMENT FOR SWIFT FOX (VULPES VELOX) IN WYOMING, DARBY N. DARK-SMILEY AND DOUGLAS A. KEINATH, prepared for United States Department of the Interior Bureau of Land Management, December 2003
Ecoregions provided by World Wide Fund For Nature (WWF). WildFinder: Online database of species distributions, ver. 01.06 WWF WildFINDER
Biodiversity Hotspots provided by Critical Ecosystem Partnership Fund
Abstract provided by DBpedia licensed under a Creative Commons License