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Red-tailed Hawk - Buteo jamaicensis
Native Species
Global Rank :
G5
State Rank :
S5B
Agency Status
USFWS :
MBTA
USFS :
BLM :
PIF :
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Copyright by Borror Laboratory of Bioacoustics, Department of Evolution, Ecology, and Organismal Biology, Ohio State University, Columbus, OH, all rights reserved.
General Description
Plumage is extremely variable, ranging from very light forms to very dark forms. The "typical" color phase is dark brown above and white below, with a band of dark speckling across the belly (belly band), and a rusty-red tail (paler underneath). Flying birds are white with brown barring underneath, dark brown edges around the wings, and dark brown shoulder patches. The dark belly band is easiest to see in flying birds. The western race of Red-tailed Hawks is darker with more streaking than the typical phase. Krider's Red-tailed Hawk is a very pale race found in the Great Plains, including eastern Montana. These are light mottled brown above and nearly pure white below. The belly band is often indistinct or absent, and the tail is usually light rust above and creamy below with faint barring. Harlan's Red-tailed Hawk (formerly considered a distinct species) is dark mottled brown above, and light brown and white streaked below, with a brown barred tail. They breed in northern Canada and Alaska, and are seen in Montana only during migration. All of these races can have light and dark individuals (color phases). The dark (melanistic) color phase is much less common than the light color phase. Melanistic Red-tailed Hawks have a dark brown belly, and dark brown wing "arms," with light flight feathers, giving their wings a two-toned appearance from underneath. The immature Red-tailed Hawks of all color phases and races look similar to the adults, except they have brown barred tails and more brown streaking over the rest of their bodies. Red-tailed Hawks range in length from 19 to 25 inches, and have a wingspan of 46 to 58 inches.
For a comprehensive review of the conservation status, habitat use, and ecology of this and other Montana bird species, please see
Marks et al. 2016, Birds of Montana.
Diagnostic Characteristics
Krider's Red-tailed Hawks are easily mistaken for Ferruginous Hawks, but they have white feathering on the legs (Ferruginous Hawks have dark feathering on the legs). Rough-legged Hawks of all ages and color phases have a white tail with a black terminal band, instead of the rust or brown tail of the Red-tailed Hawk. Swainson's Hawks have a chestnut-brown bib, but no belly band, and have dark-colored flight feathers instead of light ones.
Species Range
Montana Range
Range Descriptions
Year-round
Western Hemisphere Range
Observations in Montana Natural Heritage Program Database
Number of Observations: 42150
(Click on the following maps and charts to see full sized version)
Map Help and Descriptions
Relative Density
Recency
SUMMER (Feb 16 - Dec 14)
Direct Evidence of Breeding
Indirect Evidence of Breeding
No Evidence of Breeding
WINTER (Dec 15 - Feb 15)
Regularly Observed
Not Regularly Observed
(Observations spanning multiple months or years are excluded from time charts)
Migration
Red-tailed Hawks migrate to the southern United States for the winter, although some winter in Montana. Bozeman area: March 20 to May 10 and August 28 to October 25. Harlani and kriderii occur mainly as migrants.
Habitat
Red-tailed Hawks nest in trees and on cliffs, and hunt over grasslands, open woodlands, and agricultural areas.
Ecological Systems Associated with this Species
Details on Creation and Suggested Uses and Limitations
How Associations Were Made
We associated the use and habitat quality (common or occasional) of each of the 82 ecological systems mapped in Montana for
vertebrate animal species that regularly breed, overwinter, or migrate through the state by:
Using personal observations and reviewing literature that summarize the breeding, overwintering, or migratory habitat requirements of each species (Dobkin 1992, Hart et al. 1998, Hutto and Young 1999, Maxell 2000, Foresman 2012, Adams 2003, and Werner et al. 2004);
Evaluating structural characteristics and distribution of each ecological system relative to the species' range and habitat requirements;
Examining the observation records for each species in the state-wide point observation database associated with each ecological system;
Calculating the percentage of observations associated with each ecological system relative to the percent of Montana covered by each ecological system to get a measure of "observations versus availability of habitat".
Species that breed in Montana were only evaluated for breeding habitat use, species that only overwinter in Montana were only evaluated for overwintering habitat use, and species that only migrate through Montana were only evaluated for migratory habitat use.
In general, species were listed as associated with an ecological system if structural characteristics of used habitat documented in the literature were present in the ecological system or large numbers of point observations were associated with the ecological system.
However, species were not listed as associated with an ecological system if there was no support in the literature for use of structural characteristics in an ecological system,
even if point observations were associated with that system.
Common versus occasional association with an ecological system was assigned based on the degree to which the structural characteristics of an ecological system matched the preferred structural habitat characteristics for each species as represented in scientific literature.
The percentage of observations associated with each ecological system relative to the percent of Montana covered by each ecological system was also used to guide assignment of common versus occasional association.
If you have any questions or comments on species associations with ecological systems, please contact the Montana Natural Heritage Program's Senior Zoologist.
Suggested Uses and Limitations
Species associations with ecological systems should be used to generate potential lists of species that may occupy broader landscapes for the purposes of landscape-level planning.
These potential lists of species should not be used in place of documented occurrences of species (this information can be requested at:
mtnhp.org/requests ) or systematic surveys for species and evaluations of habitat at a local site level by trained biologists.
Users of this information should be aware that the land cover data used to generate species associations is based on imagery from the late 1990s and early 2000s and was only intended to be used at broader landscape scales.
Land cover mapping accuracy is particularly problematic when the systems occur as small patches or where the land cover types have been altered over the past decade.
Thus, particular caution should be used when using the associations in assessments of smaller areas (e.g., evaluations of public land survey sections).
Finally, although a species may be associated with a particular ecological system within its known geographic range, portions of that ecological system may occur outside of the species' known geographic range.
Literature Cited
Adams, R.A. 2003. Bats of the Rocky Mountain West; natural history, ecology, and conservation. Boulder, CO: University Press of Colorado. 289 p.
Dobkin, D. S. 1992. Neotropical migrant land birds in the Northern Rockies and Great Plains. USDA Forest Service, Northern Region. Publication No. R1-93-34. Missoula, MT.
Foresman, K.R. 2012. Mammals of Montana. Second edition. Mountain Press Publishing, Missoula, Montana. 429 pp.
Hart, M.M., W.A. Williams, P.C. Thornton, K.P. McLaughlin, C.M. Tobalske, B.A. Maxell, D.P. Hendricks, C.R. Peterson, and R.L. Redmond. 1998. Montana atlas of terrestrial vertebrates. Montana Cooperative Wildlife Research Unit, University of Montana, Missoula, MT. 1302 p.
Hutto, R.L. and J.S. Young. 1999. Habitat relationships of landbirds in the Northern Region, USDA Forest Service, Rocky Mountain Research Station RMRS-GTR-32. 72 p.
Maxell, B.A. 2000. Management of Montana's amphibians: a review of factors that may present a risk to population viability and accounts on the identification, distribution, taxonomy, habitat use, natural history, and the status and conservation of individual species. Report to U.S. Forest Service Region 1. Missoula, MT: Wildlife Biology Program, University of Montana. 161 p.
Werner, J.K., B.A. Maxell, P. Hendricks, and D. Flath. 2004. Amphibians and reptiles of Montana. Missoula, MT: Mountain Press Publishing Company. 262 p.
Commonly Associated with these Ecological SystemsForest and Woodland Systems
Grassland Systems
Human Land Use
Recently Disturbed or Modified
Shrubland, Steppe and Savanna Systems
Sparse and Barren Systems
Wetland and Riparian Systems
Occasionally Associated with these Ecological SystemsRecently Disturbed or Modified
Food Habits
Red-tailed Hawks eat primarily ground squirrels and other small rodents, but also feed on a wide variety of other animals. Red-tailed Hawks often eat snakes, including rattlesnakes.
Ecology
Numbers decreasing in Fortine area. Light phase reported most often. In Gallatin valley, 11.6% of pairs non-breeding; territories ranged from 2.6 to 4.6 sq.km.
Reproductive Characteristics
One to three eggs are laid in April. Incubation lasts about a month. The young fly in June or July when 6 to 7 weeks old. Incubation seen April 19; hatching late June; young still in nest late July. In Gallatin valley, 53% of nests successful, average 2.34 young fledged. Infertility loss = 3.7%; nesting mortality = 5.9%.
Stewardship Responsibility
References
Literature Cited AboveLegend: View Online Publication Marks, J.S., P. Hendricks, and D. Casey. 2016. Birds of Montana. Arrington, VA. Buteo Books. 659 pages.
Additional ReferencesLegend: View Online Publication Do you know of a citation we're missing? [PRESI] Powder River Eagle Studies Incorporated. 1998b. Spring Creek Mine 1997 wildlife monitoring studies. Powder River Eagle Studies Incorporated. Gillete, WY. Allen, G. T. 1979. An assessment of potential conflicts between nesting raptors and human activities in the Long Pines area of southeastern Montana with special emphasis on uranium development. M.S. thesis, Washington State University, Pullman. 109 pp. American Ornithologists’ Union [AOU]. 1998. Check-list of North American birds, 7th edition. American Ornithologists’ Union, Washington, D.C. 829 p. Andersen, D.E., O.J. Rongstad, and W.R. Mytton. 1990. Home-range changes in raptors exposed to increased human activity levels in southeastern Colorado. Wildlife Society Bulletin 18:134-142. Anderson, D.E., O.J. Rongstad, and W.R. Mytton. 1985. Line transect analysis of raptor abundance along roads. Wildl. Soc. Bull. 13(4):533-539. Atkinson, E.C. 1992. Ferruginous hawk (Buteo regalis) inventories on the Dillon Resource Area of southwest Montana: 1992. Montana Natural Heritage Program for Bureau of Land Management, Dillon Resource Area. 34 pp. Becker, D.M. 1977. A survey of breeding raptors on and adjacent to Custer National Forest lands in Carter County, Montana. Unpublished report including 1978 progress report. 107 p. Becker, Dale M., 1980, A Survey of raptors on national forest land in Carter County, Montana. Final Progress Report: 1977-1979. Bird Conservancy of the Rockies. 2017. Pocket Guide to Northern Prairie Birds. Brighton, CO: Bird Conservancy of the Rockies. 98 p. Bramblett, R.G., and A.V. Zale. 2002. Montana Prairie Riparian Native Species Report. Montana Cooperative Fishery Research Unit, Montana State University - Bozeman. Cameron, E. S. 1907. The birds of Custer and Dawson counties, Montana. Auk 24(3): 241-270. Camp Dresser & McKee, Inc., 1990, Stillwater Chromite Project Baseline Data Report: Hydrology and Wildlife Monitoring, Hydrology - November 1988 through November 1989, Wildlife - November 1988 through February 1990. June 30, 1990 Casey, D. 2005. Rocky Mountain Front avian inventory. Final report. Prepared for the U.S. Fish and Wildlife Service and The Nature Conservancy by the American Bird Conservancy, Kalispell, Montana. Confluence Consulting Inc. 2010. Montana Department of Transportation Wetland Mitigation Monitoring Reports (various sites). MDT Helena, MT. Confluence Consulting Inc. 2011. Montana Department of Transportation Wetland Mitigation Monitoring Reports (various sites). MDT Helena, MT. Confluence Consulting Inc. 2012. Montana Department of Transportation Wetland Mitigation Monitoring Reports (various sites). MDT Helena, MT. Confluence Consulting Inc. 2013. Montana Department of Transportation Wetland Mitigation Monitoring Reports (various sites). MDT Helena, MT. Craighead, A.C. 2000. Pellet and scat analysis as indicators of present and past habitats. M.Sc. Theses. Bozeman, MT: Montana State University. 219 p. Decker Coal Co., 1981, Wildlife survey. July 7, 1981. In North Decker 5-Year Permit Application. Vol. III. Rule 26.4.304(12-14). Decker Coal Company., 1991, Decker Coal Company West Pit Permit. Vol. 3. 26.4.304(10-11), 305, 306, and 307. Updated Rules Rewrite, July 1, 1991. Dickson, D.C. 1991. Systematic wildlife observations on the Blackfoot-Clearwater Wildlife Management Area. Montana Department of Fish, Wildlife and Parks. Missoula, MT. 14 pp. plus appendices and photographs. Dobkin, D. S. 1992. Neotropical migrant landbirds in the Northern Rockies and Great Plains. U.S.D.A. For. Serv. N. Region Publ. R1-93-34. Missoula, Mont. Dood, A.R. 1980. Terry Badlands nongame survey and inventory final report. Montana Department of Fish, Wildlife, and Parks and Bureau of Land Management, Helena, MT. 70 pp. DuBois, K. 1984. Rocky Mountain Front Raptor Survey: December 1982 - August 1984. FWS-6-81-112. Dubois, K. 1988. Kevin Rim/Sweetgrass Hills raptor survey. Bureau of Land Management. 8 p. plus data appendices. DuBois, K. and D. Becker. 1987. Identification of Montana's birds of prey. Montana Outdoors Nov/Dec. 20 p. DuBois, K.L. 1979. An inventory of the avifauna in the Long Pines of Southeastern Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 113 p. ECON, Inc. (Ecological Consulting Service), Helena, MT., 1975, Colstrip 10 x 20 Area wildlife and wildlife habitat annual monitoring report, 1975. Proj. 71-23-A. December 31, 1975. ECON, Inc. (Ecological Consulting Service), Helena, MT., 1976, Colstrip 10 x 20 Area wildlife and wildlife habitat annual monitoring report, 1976. Proj. 135-85-A. December 31, 1976. Econ, Inc. (Ecological Consulting Service), Helena, MT., 1977, 1977 wildlife and wildlife habitat monitoring study, Peabody Coal Company Big Sky Mine. Proj. 161-85-A. November 30, 1977. ECON, Inc. (Ecological Consulting Service), Helena, MT., 1977, Colstrip 10 x 20 Area wildlife and wildlife habitat annual monitoring report, 1977. Proj. 164-85-A. December 31, 1977. ECON, Inc. (Ecological Consulting Service), Helena, MT., 1979, Annual wildllife report of the Colstrip Area for 1978. Proj. 195-85-A. April 6, 1979. ECON, Inc. (Ecological Consulting Service), Helena, MT., 1979, Annual wildllife report of the Colstrip Area for 1979, including a special raptor research study. Proj. 216-85-A. March 1, 1980. ECON, Inc. (Ecological Consulting Service), Helena, MT., 1979, Area B four-section wildlife report. August 3, 1979. Econ, Inc., Helena, MT., 1978, Peabody Coal Company Big Sky Mine, Rosebud County, MT. Wildlife and wildlife habitat monitoring study. Proj. 190-85-A. December 31, 1978. Ehrlich, P., D. Dobkin, and D. Wheye. 1988. The birder’s handbook: a field guide to the natural history of North American birds. Simon and Schuster Inc. New York. 785 pp. Elliott, Joe C. and Hydrometrics, Inc., Helena, MT., 1994, Supplement to wildlife baseline investigation life-of-mine expansion plan: Regal Mine, Barretts Minerals, Inc., Madison County, Montana. August 2000. In Life-of Mine Expansion Plan: Barretts Minerals, Inc., Regal Mine, Madison County, Montana. Vol. 2. App. C: Baseline Wildlife Reconnaissance. December 1999. Faanes, C.A. 1983. Breeding birds of wooded draws in western North Dakota. Prairie Nat. 15(4): 173-187. Farmer, Patrick J., Western Technology & Eng., Inc., Helena, MT., 1996, Bald eagle nesting survey in the vicinity of the proposed McDonald Project. June 1996. Fjell, Alan K., and Brian R. Mahan., 1983, Peabody Coal Company Big Sky Mine, Rosebud County, MT. Wildlife monitoring report: 1982 field season. May 1983. Flath, Dennis L., 1982, Statewide small mammal distribution and habitat association. Mammalian Nongame Ecology Studies, NG-1.0, 1. Avian Nongame Ecology Studies, NG-2.0, 1,2,3,4. Statewide Wildlife Research. Nongame Wildlife Research & Inventory. W-120-R-13 (5853) IV. Garcia and Associates, 2004. Northern Goshawk Surveys for the East Short Pines and the Ekalaka Hills, Sioux Ranger District, Custer National Forest. 8 pp. plus appendices. Gillihan, SW. and T. VerCauteren. 2015. Pocket Guide to Prairie Birds. Brighton, CO: Bird Conservancy of the Rockies. 91 p. Gniadek, S. 1983. Southwest Glendive Wildlife Baseline Inventory. Miles City, Mont: Bureau of Land Management, Miles City District Office. 56 pp with appendices. Goodell, J. 2012. Morse Land Company Breeding Bird Inventory And Analysis. High Desert Museum. Bend, OR. 42 pp + Appendices. Haight, C.P. 1937. Some observations on the predator-prey complex in the Gallatin Valley. M.Sc. Thesis. Bozeman, Montana: Montana State University. 58 p. Hansen, R. W. 1995. Ecological relationships between nesting Swainson's and red-tailed hawks in southeastern Idaho. J. Raptor Res. 29:166-171. Harmata, A.R. 1991. Impacts of oil and gas development on raptors associated with Kevin Rim, Montana. Bozeman, MT: Montana State University. Unpublished report by the Kevin Rim Raptor Study Group. Prepared for the USDI BLM, Great Falls Resource Area, Great Falls, MT. 106 p. Hays, R., R.L. Eng, and C.V. Davis (preparers). 1984. A list of Montana birds. Helena, MT: MT Dept. of Fish, Wildlife & Parks. Hejl, S.J., R.L. Hutto, C.R. Preston, and D.M. Finch. 1995. The effects of silvicultural treatments on forest birds in the Rocky Mountains. pp. 220-244 In: T.E. Martin and D.M. Finch (eds). Ecology and Management of Neotropical Migratory Birds. New York, NY: Oxford Univ. Press. 489 p. Hendricks, P. 2000. Roadside bird counts on BLM lands in Petroleum and Fergus Counties, Montana. Montana Natural Heritage Program, Helena, MT. 57pp. Hendricks, P. and C.J. Norment. 1986. Additions to the alpine avifauna of the Beartooth Mountains. The Murrelet 67:90-92. Hendricks, P. and M. Roedel. 2001. 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Birds of the Rocky Mountains with particular reference to national parks in the northern Rocky Mountain region. Lincoln: University of Nebraska Press. xi + 504 pp. Johnson, S.J. 1973. Reproductive success and post-fledging behavior of Red-tailed Hawks (Buteo jamaicensis) in the Gallatin Valley. Ph.D. Dissertation. Bozeman, Montana: Montana State University. 61 p. Joslin, Gayle, and Heidi B. Youmans. 1999. Effects of recreation on Rocky Mountain wildlife: a review for Montana . [Montana]: Montana Chapter of the Wildlife Society. Kessler, W.B. and T.E. Kogut. 1985. Habitat orientations of forest birds in southeastern Alaska. Northwest Sci. 59(1): 58-65. Knopf, F.L. 1986. Changing landscapes and the cosmopolitism of the eastern Colorado avifauna. Wildlife Society Bulletin 14(2):132-142. Land & Water Consulting, Inc., Missoula, MT., 2002, Montana Dept. of Transportation Wetland Mitigation Monitoring Report, Year 2001: Ringling - Galt, Ringling, Montana. Proj. No. 130091.015. July 2002. 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