Animalia > Chordata > Aves > Accipitriformes > Accipitridae > Buteo > Buteo lagopus

Buteo lagopus (Rough-legged Hawk; Roughleg)

Synonyms: Archibuteo lagopus; Falco lagopus (homotypic); Falco spec
Language: French; Spanish

Wikipedia Abstract

The rough-legged buzzard (Buteo lagopus), also called the rough-legged hawk, is a medium-large bird of prey. It is found in Arctic and Subarctic regions of North America and Eurasia during the breeding season and migrates south for the winter. It was traditionally also known as the rough-legged falcon in such works as John James Audubon's The Birds of America.
View Wikipedia Record: Buteo lagopus


EDGE Analysis

Uniqueness Scale: Similiar (0) 
 Unique (100)
Uniqueness & Vulnerability Scale: Similiar & Secure (0) 
 Unique & Vulnerable (100)
ED Score: 2.95717
EDGE Score: 1.37553


Adult Weight [1]  2.088 lbs (947 g)
Birth Weight [3]  42 grams
Female Weight [6]  2.348 lbs (1.065 kg)
Male Weight [6]  1.867 lbs (847 g)
Weight Dimorphism [6]  25.7 %
Breeding Habitat [2]  Arctic tundra
Wintering Geography [2]  Northern U.S./Canada
Wintering Habitat [2]  Temperate grasslands, Agricultural
Diet [4]  Carnivore (Invertebrates), Carnivore (Vertebrates), Piscivore
Diet - Endothermic [4]  80 %
Diet - Fish [4]  10 %
Diet - Invertibrates [4]  10 %
Forages - Ground [4]  100 %
Clutch Size [7]  4
Clutches / Year [3]  1
Fledging [5]  41 days
Global Population (2017 est.) [2]  610,000
Incubation [3]  29 days
Mating Display [8]  Non-acrobatic aerial display
Mating System [8]  Monogamy
Maximum Longevity [3]  19 years
Migration [9]  Intracontinental
Raptor Research Conservation Priority [10]  134
Snout to Vent Length [5]  21 inches (54 cm)
Speed [11]  23.488 MPH (10.5 m/s)
Wing Span [11]  4.428 feet (1.35 m)
Female Maturity [3]  2 years
Male Maturity [3]  2 years


Protected Areas

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Important Bird Areas

Biodiversity Hotspots

Prey / Diet

Prey / Diet Overlap


Falco rusticolus (Gyrfalcon)[12]


Range Map

External References

NatureServe Explorer


Attributes / relations provided by
1Storchová, Lenka; Hořák, David (2018), Data from: Life-history characteristics of European birds, Dryad, Dataset,
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
5Nathan 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
6Hickling, R. (Ed.) (1983) Enjoying Ornithology. T & AD Poyser, Calton
7Jetz 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
8Terje Lislevand, Jordi Figuerola, and Tamás Székely. 2007. Avian body sizes in relation to fecundity, mating system, display behavior, and resource sharing. Ecology 88:1605
9Myers, 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
10Buechley ER, Santangeli A, Girardello M, et al. Global raptor research and conservation priorities: Tropical raptors fall prey to knowledge gaps. Divers Distrib. 2019;25:856–869.
11Alerstam T, Rosén M, Bäckman J, Ericson PGP, Hellgren O (2007) Flight Speeds among Bird Species: Allometric and Phylogenetic Effects. PLoS Biol 5(8): e197. doi:10.1371/journal.pbio.0050197
12Jorrit 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.
13Predator–prey relationships: arctic foxes and lemmings, Anders Angerbjorn, Magnus Tannerfeldt and Sam Erlinge, Journal of Animal Ecology, Volume 68, Issue 1, Pages 34-49
14Making The Forest And Tundra Wildlife Connection
15Lepus arcticus, Troy L. Best and Travis Hill Henry, MAMMALIAN SPECIES No. 457, pp. 1-9 (1994)
16Microtus miurus (Rodentia: Cricetidae), F. RUSSELL COLE AND DON E. WILSON, MAMMALIAN SPECIES 42(855):75–89 (2010)
17Microtus montanus, Wendy E. Sera and Cathleen N. Early, MAMMALIAN SPECIES No. 716, pp. 1–10 (2003)
18Mustela frenata, Steven R. Sheffield and Howard H. Thomas, MAMMALIAN SPECIES No. 570, pp. 1-9 (1997)
19Myotis velifer, John H. Fitch, Karl A. Shump, Jr., and Ann U. Shump, Mammalian Species No. 149, pp. 1-5 (1981)
21Sciurus niger, John L. Koprowski, MAMMALIAN SPECIES No. 479, pp. 1-9 (1994)
22Spermophilus townsendii, Eric A. Rickart, MAMMALIAN SPECIES No. 268, pp. 1-6 (1987)
23Gibson, D. I., Bray, R. A., & Harris, E. A. (Compilers) (2005). Host-Parasite Database of the Natural History Museum, London
24International Flea Database
Ecoregions provided by World Wide Fund For Nature (WWF). WildFinder: Online database of species distributions, ver. 01.06 Wildfinder Database
Biodiversity Hotspots provided by Critical Ecosystem Partnership Fund
Abstract provided by DBpedia licensed under a Creative Commons License
Species taxanomy provided by GBIF Secretariat (2022). GBIF Backbone Taxonomy. Checklist dataset accessed via on 2023-06-13; License: CC BY 4.0