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Ferruginous Hawk Buteo regalis

Justification
This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population trend appears to be increasing, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size may be moderately small to large, but it is not believed to approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.

Taxonomic source(s)
AOU. 1998. Check-list of North American birds. American Ornithologists' Union, Washington, D.C.
Sibley, C. G.; Monroe, B. L. 1990. Distribution and taxonomy of birds of the world. Yale University Press, New Haven, USA.
Stotz, D. F.; Fitzpatrick, J. W.; Parker, T. A.; Moskovits, D. K. 1996. Neotropical birds: ecology and conservation. University of Chicago Press, Chicago.

Distribution and population
This species occurs in North America, nesting in 17 states in the USA and three provinces in Canada. It winters in the south USA and north Mexico.

Population justification
(Rich et al. 2004)

Trend justification
This species has undergone a large and statistically significant increase over the last 40 years in North America (155% increase over 40 years, equating to a 26.3% increase per decade; data from Breeding Bird Survey and/or Christmas Bird Count: Butcher and Niven 2007).

Ecology
An open-country species inhabiting grasslands, shrub-steppes and deserts.

Threats
Threats include cultivation, over-grazing and fire degrading habitat throughout its range, and the controlling of small mammal populations (prairie-dog towns and gopher populations) limiting food resources.

Conservation Actions Underway
CITES Appendix II. CMS Appendix II.

Related state of the world's birds case studies

References
Bechard, M. J.; Schmutz, J. K. 1995. Ferruginous Hawk (Buteo regalis). In: Poole, A.; Gill, F. (ed.), The birds of North America, pp. 1-20. The Academy of Natural Sciences and The American Ornithologists' Union, Philadelphia and Washington, DC.

Dechant, J. A.; Sondreal, M. L.; Johnson, D. H.; Igl, L. D.; Goldade, C. M.; Zimmerman, A. L.; Euliss, B. R. 1999. Effects of management practices on grassland birds: Ferruginous Hawk.

Rich, T.D.; Beardmore, C.J.; Berlanga, H.; Blancher, P.J.; Bradstreet, M.S.W.; Butcher, G.S.; Demarest, D.W.; Dunn, E.H.; Hunter, W.C.; Inigo-Elias, E.E.; Martell, A.M.; Panjabi, A.O.; Pashley, D.N.; Rosenberg, K.V.; Rustay, C.M.; Wendt, J.S.; Will, T.C.

Text account compilers
Wege, D., Benstead, P., Mahood, S.

IUCN Red List evaluators
Butchart, S., Symes, A.

Recommended citation
BirdLife International (2014) Species factsheet: Buteo regalis. Downloaded from http://www.birdlife.org on 10/07/2014. Recommended citation for factsheets for more than one species: BirdLife International (2014) IUCN Red List for birds. Downloaded from http://www.birdlife.org on 10/07/2014.

This information is based upon, and updates, the information published in BirdLife International (2000) Threatened birds of the world. Barcelona and Cambridge, UK: Lynx Edicions and BirdLife International, BirdLife International (2004) Threatened birds of the world 2004 CD-ROM and BirdLife International (2008) Threatened birds of the world 2008 CD-ROM. These sources provide the information for species accounts for the birds on the IUCN Red List.

To provide new information to update this factsheet or to correct any errors, please email BirdLife

To contribute to discussions on the evaluation of the IUCN Red List status of Globally Threatened Birds, please visit BirdLife's Globally Threatened Bird Forums.

Key facts
Current IUCN Red List category Least Concern
Family Accipitridae (Osprey, kites, hawks and eagles)
Species name author (Gray, 1844)
Population size mature individuals
Population trend Increasing
Distribution size (breeding/resident) 2,780,000 km2
Country endemic? No
Links to further information
- Additional Information on this species