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Montana Field Guide

Montana Field Guides

Northern Pygmy-Owl - Glaucidium gnoma

Native Species

Global Rank: G4G5
State Rank: S4
(see State Rank Reason below)


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.
State Rank Reason (see State Rank above)
Species is distributed across forested areas of western and central Montana. It faces threats from loss of snaggs used for breeding. Trend appears stable.
Northern Pygmy-Owl (Glaucidium gnoma) Conservation Status Summary
State Rank: S4
Review Date = 10/20/2025
See the complete Conservation Status Rank Report
How we calculate Conservation Status Ranks
 
General Description
Round-headed, eyes yellow, bill yellow, yellow/green, yellow/black, or yellow/white. Eyebrows distinctive white. Feathers extending from back of eyebrows can be raised, like tufts, when alarmed. True facial disk absent. Head finely spotted. Ventrally, dark mottled head and neck, giving way to white chest, belly, and sides, with vertical brown streaking. Dorsally, dark mottling with conspicuously long tail. Has conspicuous false eyes or eye marks on back of head. SIZE: six to seven inches. WEIGHT: two or three ounces. VOICE: Two songs. One is "Toot, toot, toot", given rapidly six to eight times. Song is similar to that of the Saw-whet Owl and the two are difficult to distinguish. This song is most often heard in fall, winter, and the early part of the breeding season. The second song, "Toot (pause) toot", is the typical breeding season call.

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.

Species Range
Montana Range Range Descriptions

Year-round

Western Hemisphere Range

 


Observations in Montana Natural Heritage Program Database
Number of Observations: 2401

(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
Probably resident year-round, with some elevational movements.

Habitat
Not well known, most often seen in mixed fir forests, but can be found from river bottoms to timberline.

National Vegetation Classification System Groups Associated with this Species

Food Habits
Small birds, mammals, insects, and probably a few reptiles and amphibians. Small birds may be an important part of its diet.

Reproductive Characteristics
Begins breeding in April. Nests in woodpecker holes and possibly natural cavities. Clutch size three to five. Incubation not well known, but probably around 25 days. Young fledge at approximately 30 days. Young have been observed in June.


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?
    • American Ornithologists’ Union [AOU]. 1998. Check-list of North American birds, 7th edition. American Ornithologists’ Union, Washington, D.C. 829 p.
    • Brelsford, M. 1992. Boreal owl (Aegolius funereus) and flammulated owl (Otus flammeolus) survey results for the Bozeman district of the Gallatin National Forest. Unpublished report to the Gallatin National Forest by the Montana Natural Heritage Program, Helena, MT. 20 pp.
    • Brelsford, M. 1992. Boreal owl (Aegolius funereus) and flammulated owl (Otus flammeolus) survey results for the Livingston district of the Gallatin National Forest. Unpublished report to the Gallatin National Forest by the Montana Natural Heritage Program, Helena, MT. 22 pp.
    • Call, M.W. 1979. Habitat management guides for birds of prey. Technical Note 338. Denver, CO: USDI Bureau of Land Management. 70 p.
    • Cameron, E. S. 1907. The birds of Custer and Dawson counties, Montana. Auk 24(3): 241-270.
    • Clark, R.J., D.G. Smith, and L. Kelso. 1987. Distributional status and literature of northern forest owls. Pp. 47-55 in Nero R.W., R.J. Clark, R.J. Knapton, and R.H. Hamre (eds.), Biology and conservation of northern forest owls: symposium proceedings, Feb. 3-7, Winnepeg, Manitoba. Gen. Tech. Rep. RM-142. USDA, Forest Service:, Rocky Mountain Forest and Range Experiment Station, Fort Collins, CO. 309 pp.
    • Deppe, Caroline. 2000. The effect of Northern Pygmy-owl (Glaucidium gnoma) false eyespots on avian mobbing. M.S. Thesis. University of Montana. Missoula, MT.
    • 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.
    • Eng, R.L. 1976. Wildlife Baseline Study [for West Fork of the Stillwater and Picket Pin drainages]
    • Farmer, Patrick. J., et al., Western Technology and Eng., Inc., Helena, MT., 1984, Montana Tunnels Project Baseline Terrestrial Wildlife Study. December 14, 1984. In Application for a Hard Rock Operating Permit, Montana Tunnels Project, Jefferson County, Montana. Vol. 3. Environmental Baseline Reports. (Centennial Minerals, Inc., Hydrometrics, 1984?)
    • 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. 2005. Surveys for animal species of concern in northwestern Montana. Unpublished report to the Montana Department of Fish, Wildlife & Parks, Montana Natural Heritage Program, Helena, Montana, May 2005. 53 p.
    • Holt, D. W., and J. M. Hillis. 1987. Current status and habitat associations of forest owls in western Montana. Pages 281-288 in Biology and conservation of northern forest owls: Symposium proceedings (R. W. Nero, R. J. Clark, R. J. Knapton, and R. H. Hamre, Eds.). U.S. Forest Service General Technical Report RM-142, Fort Collins, Colorado.
    • Holt, D. W., and L. A. Leroux. 1996. Diets of Northern Pygmy-Owls and Northern Saw-whet Owls in west-central Montana. Wilson Bulletin 108(1):123-128.
    • Holt, D.W. and J.L. Petersen. 2000. Northern Pygmy-owl (Glaucidium gnoma). Species Account Number 494. 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
    • Johnsgard, P.A. 1992. 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.
    • 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.
    • 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.
    • Martin, Steve A., ECON, Inc., Helena, MT., 1982, Flathead Project Wildlife Report, 1981-1982. November 30, 1982.
    • McWethy, D.B. 2007. Bird response to landscape and pattern disturbance across productivity gradients in forests of the Pacific Northwest. Ph.D. Dissertation. Bozeman, MT: Montana State University. 184 p.
    • Montana Bird Distribution Committee. 2012. P.D. Skaar's Montana bird distribution. 7th Edition. Montana Audubon, Helena, Montana. 208 pp. + foldout map.
    • MT Fish, Wildlife & Parks. No date. Blackfoot-Clearwater Wildlife Management Area checklist.
    • Oechsli, L.M. 2000. Ex-urban development in the Rocky Mountain West: consequences for native vegetation, wildlife diversity, and land-use planning in Big Sky, Montana. M.Sc. Thesis. Montana State University, Bozeman. 73 p.
    • Roy F. Weston, Inc., Bozeman, MT., and Western Technology and Engineering, Inc., Helena, MT., 1989, Stillwater PGM Resources East Boulder Project Addendum F: Supplemental Biological Studies. Final Report. December 1989.
    • Saunders, A.A. 1914. The birds of Teton and northern Lewis & Clark counties, Montana. Condor 16:124-144.
    • Sibley, D. 2014. The Sibley guide to birds. Alfred A. Knopf, New York, NY. 598 pp.
    • Skaar, P. D., D. L. Flath, and L. S. Thompson. 1985. Montana bird distribution. Montana Academy of Sciences Monograph 3(44): ii-69.
    • Skaar, P.D. 1969. Birds of the Bozeman latilong: a compilation of data concerning the birds which occur between 45 and 46 N. latitude and 111 and 112 W. longitude, with current lists for Idaho, Montana, Wyoming, impinging Montana counties and Yellowstone National Park. Bozeman, MT. 132 p.
    • Swan River National Wildlife Refuge. 1982. Birds of the Swan River NWR. Kalispell, MT: NW MT Fish and Wildlife Center pamphlet.
    • Thompson, Richard W., Western Resource Dev. Corp., Boulder, CO., 1996, Wildlife baseline report for the Montana [Montanore] Project, Lincoln and Sanders counties, Montana. In Application for a Hard Rock Operating Permit and Proposed Plan of Operation, Montanore Project, Lincoln and Sanders Counties, Montana. Vol. 5. Stroiazzo, John. Noranda Minerals Corp., Libby, MT. Revised September 1996.
    • TVX Mineral Hill Mine, Amerikanuak, Inc., Gardiner, MT., 2002, Yearly summary of wildlife observation reports. 1990-2002 Letter reports.
    • 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.
    • Waldt, R. 1995. The Pine Butte Swamp Preserve bird list. Choteau, MT: The Nature Conservancy. Updated August 1995.
    • Watts, C.R. and L.C. Eichhorn. 1981. Changes in the birds of central Montana. Proceedings of the Montana Academy of Sciences 40:31-40.
    • Zackheim, K. 1973. Exhibit H: Wildlife Study. In Ash Grove Cement Co. files.
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Citation for data on this website:
Northern Pygmy-Owl — Glaucidium gnoma.  Montana Field Guide.  .  Retrieved on , from