Black-billed Magpie - Pica hudsonia
FWP Conservation Tier
The Black-billed Magpie is medium-sized and boldly patterned. Sexes similar in appearance, and plumages similar throughout year. Adults largely black, with contrasting white scapulars, white belly, iridescent metallic blue-green wings and tail, and large white markings on primaries (rarely on secondaries), with form white patch on wing when wing is extended. Tail long and graduated. Sexes distinguished by differences in size. Males are larger (Trost 1999).
Summary of Observations Submitted for Montana
Number of Observations:
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Map Help and Descriptions
(direct evidence "B")
(indirect evidence "b")
No evidence of Breeding
(regular observations "W")
(at least one obs. "w")
(Records associated with a range of dates are excluded from time charts)
Historically, it frequently followed Native Americans and lived on the refuse of their hunts. In breeding season will be found in thickets in riparian areas, often associated with open meadows, grasslands, or sagebrush for foraging. Less specific in its habitat requirements in nonbreeding season. Frequently numerous near human habitats such as livestock feedlots, barnyards, landfills, sewage lagoons, and grain elevators (Trost 1999).
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 (high, medium, or low) 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 2001, 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 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 associated as using 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 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.
High, medium, and low habitat quality was assigned based on the degree to which the structural characteristics of an ecological system matched the preferred structural habitat characteristics for each species in the 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 assignments of habitat quality.
If you have any questions or comments on species associations with ecological systems, please contact Bryce Maxell at email@example.com
or (406) 444-3655.
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: http://mtnhp.org/requests/default.asp
) 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.
- 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. 2001. The wild mammals of Montana. Special Publication No. 12. Lawrence, KS: The American Society of Mammalogists. 278 p.
- 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 Systems
Forest and Woodland Systems
Open Water / Wetland and Riparian Systems
Shrubland, Steppe and Savanna Systems
- Occasionally Associated with these Ecological Systems
Forest and Woodland Systems
Open Water / Wetland and Riparian Systems
Ground-dwelling arthropods, seeds, and carrion (Trost 1999).
South of Missoula nesting density was 55.5 pairs per square mile; nesting range averaged 0.39 miles in diameter; and feeding territory averaged 400 feet in diameter. Humans and pine squirrels caused 14% and 12% of nesting failures. The Great Horned Owl is also a predator.
Nests are durable, domed structures of sticks, with mud cup and anchor. Generally prefers high trees. Have been know to nest on utility poles. Eggs usually subelliptical in shape, and tan or olive brown colored background with speckles (Trost 1999). South of Missoula the average clutch size was 6.5; 58% hatched; 88% of the young fledged; and the minimum breeding age was 1 year. Statewide, egg dates range from March 28 to May 26.
- Additional ReferencesLegend: View WorldCat Record View Online Publication
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- American Ornithologists' Union. 1998. Check-list of North American birds. 7th edition. American Ornithologists' Union, Washington, D.C. 829 pp.
- Atwell, G. C. 1959. An evaluation of magpie predation on the ring-necked pheasant. M.S. thesis. Montana State Univ., Bozeman. 74 pp.
- Baril, Steven F., and Daniel Sullivan, 1983, Brodifacoum in bait stations for managing Columbian ground squirrels. Tech. Rep. 83-2. December 1983.
- Becker, D. M. 1987. Use of black-billed magpie nests by American kestrels in southeastern Montana. The Prairie Naturalist 19(1):41-42.
- Bergeson, W. R., and R. J. Greene. 1948. Experimental poisoning of magpies. Montana Fish and Game Dept. P-R Quarterly Report. January-March: 154-161.
- Brown, R. L. 19?? Magpie ups and downs. MT Fish and Game Dept. Info. Bull. No. 3.
- Brown, R. L. 1955. The population ecology of the magpie in western Montana. M.S. thesis. Montana State University, Bozeman. 53 pp.
- Brown, R. L. 1959. Magpie ups and down. Montana Wildlife. February.
- 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.
- Farmer, Pat, and Dean Culwell, Westech, Inc. [Western Technology and Engineering], Helena, MT., 1981, Terrestrial wildlife reconnaissance. March 1981.
- Godfrey, W. Earl. 1966. The birds of Canada. National Museums of Canada. Ottawa. 428 pp.
- Graham, Dean, and Craig Swick., 1977, A Field evaluation of the cyclone seeder for reducing Richardson ground squirrel populations causing damage in central Montana . August 1977.
- Greene, R. J. 1948. Pheasant nest predation by magpies. Montana Fish and Game Dept. P-R Quarterly Rep., October-December: 171-179.
- Jellison, W. L. 1933. Faunae of nests of the magpie and crow in western Montana. Can. Entomol. 65:26-31.
- Johnsgard, P. A. 1986. Birds of the Rocky Mountains with particular reference to national parks in the Northern Rocky Mountain region. Colorado Associated University Press, Boulder. xi + 504 pp.
- Land & Water Consulting, Inc., Missoula, MT., 2002, Montana Dept. of Transportation Wetland Mitigation Monitoring Report, Year 2002: Cow Coulee, Townsend, Montana. Proj. No. 130091.013. February 2003. In 2002 Wetland Mitigation Monitoring Reports, Vol. I.
- Landusky Mining Inc., Zortman, MT. Assisted by Hydrometrics, Helena, MT., 1985, Operating Permit Application for an Extension of Landusky Mining Incorporated Operations, Phillips County, Montana. June 12, 1985
- Lenard, S., J. Carlson, J. Ellis, C. Jones, and C. Tilly. 2003. P. D. Skaar's Montana Bird Distribution, 6th Edition. Montana Audubon: Helena, MT, 144 pp.
- Lockhart, J. Michael, 1976, Effects of coal extraction and related development on wildlife populations. Annual progress report; Calendar year 1976. In Decker Coal Company West Pit Permit. Vol. 3. 26.4.304(10-11), 305, 306, and 307. Updated Rules Rewrite, July 1, 1991. Appendix F.
- Madge, S. and H. Burn. 1994. Crows and Jays: A guide to crows, jays, and magpies of the world. Houghton Mifflin Company, N.Y. 191 pp.
- O'Halloran, P. L. 1961. Dynamics of a reduced magpie population. M.S. thesis. University of Montana, Missoula. 78 pp.
- Ruff, R. L. 1963. A study of the predatory effects of a reduced magpie population on the ring-necked pheasant. M.S. thesis. University of Montana, Missoula. 96 pp.
- Salt, W.R. and J.R. Salt. 1976. The birds of Alberta. Hurtig Publishers, Edmonton, Alberta. xv + 498 pp.
- Stevenson, R. E. 1971. Temperature acclimatization in the black-billed magpie (Pica pica hudsoni, Sabine). Ph.D. thesis, Montana State University, Bozeman. 33 pp.
- Stewart, R.E. 1975. Breeding birds of North Dakota. Tri-College Center for Environmental Studies, Fargo, North Dakota. 295 pp.
- Sullivan, Daniel, 1982, Bait stations as a means of rodenticide presentation to control Columbian ground squirrrels. Technical Rep. 82-3. Sept. 1982.
- Swenson, J.E. 1980. Seasonal changes in habitat use and flock size by Black-billed Magpies along the lower Yellowstone River, Montana. Prairie Nat. 12(3&4): 105-109.
- The Anaconda Co., 1976, Wildlife survey: The Anaconda Company Berkeley Complex 1976 Proposed Permit Area. May 6, 1976.
- Trost, Charles H. 1999. Black-billed Magpie (Pica hudsonia). Species Account Number 389. The Birds of North America Online (A. Poole, Ed.). Ithaca, NY: Cornell Laboratory of Ornithology; Retrieved 3/25/2008 from The Birds of North America Online database
- U.S. Forest Service. 1991. Forest and rangeland birds of the United States: Natural history and habitat use. U.S. Department of Agriculture, Forest Service Agricultural Handbook 688. 625 pages.
- VTN Environmental Sciences, Sheridan, Wyoming for Montana Dept. of State Lands, 1973, Environmental Analysis Decker Coal Company Mine, Decker, Montana.
- Waage, Bruce C., compiler., 1984, Western Energy Company Rosebud Mine, Rosebud County, Montana: Annual Wildlife Monitoring Report, 1983 Field Season. June 1984.
- Western Technology and Engineering, Inc., Helena, MT., 1989, Reconnaissance of the wildlife resources in the vicinity of the Kendall Venture Mine. January 1989. In Kendall Venture North Moccasin Project: Amendment to Operating Permit 00122, Fergus County, Montana. Vol. 2, App. A, Feb., 1989.
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