View in other NatureServe Network Field Guides
NatureServe
Montana
Utah
Wyoming
Idaho
Wisconsin
British Columbia
South Carolina
Yukon
California
New York
Double-crested Cormorant - Nannopterum auritum
Other Names:
Phalacrocorax auritus
Native Species
Global Rank:
G5
State Rank:
S5B
(see State Rank Reason below)
Agency Status
USFWS:
MBTA
USFS:
BLM:
PIF:
External Links
State Rank Reason (see State Rank above)
Species is relatively common within suitable habitat and widely distributed across portions of the state.
General Description
Large, dark cormorant. Typical length 70 to 90cm, body mass 1.2 to 2.5 kg. Sexes are alike. Males are slightly larger than females. Adults have black or dark-brown plumage, with a dull greenish or bronze gloss. The orange-yellow skin of face and throat is distinctive throughout the year. The "double crest" feathers are variable and are fully developed for only a short time early in the year. This is the only seasonal change. Has totipalmate feet in which all 4 toes are connected by web (Hatch and Weseloh 1999).
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
Western Hemisphere Range
Observations in Montana Natural Heritage Program Database
Number of Observations: 9962
(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
Birds breeding east of the Rocky Mountains generally winter along the Gulf of Mexico from Florida to Texas (Dolbeer 1991). In the Bozeman area they are seen during spring migration from April 10 to May 30 and intermittently from July to October 10, with a peak in the fall around September 6.
Habitat
Occupies diverse aquatic habitats in all seasons. Requires, in addition to feeding habitats, suitable places for daytime resting or loafing and nighttime roosts (Hatch and Weseloh 1999).
National Vegetation Classification System Groups Associated with this Species
Wetland and Riparian
Alkaline - Saline Wetlands
Alpine Riparian and Wetland
Peatland
Riparian and Wetland Forest
Riparian Shrubland
Wet Meadow and Marsh
Food Habits
At most sites eats almost entirely fish preferring slow-moving or schooling species. (Hatch and Weseloh 1999).
Reproductive Characteristics
Typically a single brood. Second broods per season are rare. Clutch size is 1 to 7 eggs with 4 being normal. Nesting is done in colonies (Hatch and Weseloh 1999). Nesting occurs in late May to early June.
Stewardship Responsibility
References
- Literature Cited AboveLegend:
View Online Publication- Dolbeer, R.A. 1991. Migration patterns of Double-crested Cormorants east of the Rocky Mountains. Journal of Field Ornithology 62(1):83-93.
- 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.
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.
- Carlsen, T. and R. Northrup. 1992. Canyon Ferry Wildlife Management Area Final Draft Management Plan. March 1992.
- 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.
- Conniff, R. 1991. Why catfish farmers want to throttle the crow of the sea. Smithsonian. July 1991. pp. 44-50, 52, 54-55.
- 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.
- 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.
- Feigley, H. P. 1997. Colonial nesting bird survey on the Bureau of Land Management Lewistown District: 1996. Unpublished report, U.S. Bureau of Land Management, Lewistown, Montana.
- 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.
- Hatch, Jeremy J., and D. V. Weseloh. 2004. Double-crested Cormorant (Phalacrocorax auritus). Species Account Number 441. 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
- Hays, R., R.L. Eng, and C.V. Davis (preparers). 1984. A list of Montana birds. Helena, MT: MT Dept. of Fish, Wildlife & Parks.
- Hoffmann, R.S., R.L. Hand, and P.L. Wright. 1959. Recent bird records from western Montana. The Condor 61(2):147-151.
- Idaho Fish & Game. Idaho's water birds: the colony nesters. Nongame Wildlife Leaflet 2. 12 p.
- Johnsgard, P. A. 1993. Cormorants, darters, and pelicans of the world. Smithsonian Institute Press, Washington, D.C. xiv + 445 pp.
- Johnsgard, P.A. 1979. Birds of the Great Plains: breeding species and their distribution. University of Nebraska Press, Lincoln. 539 pp.
- 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.
- Knopf, F.L. 1986. Changing landscapes and the cosmopolitism of the eastern Colorado avifauna. Wildlife Society Bulletin 14(2):132-142.
- Koel, T.M., L.M. Tronstad, J.L. Arnold, K.A. Gunter, D.W. Smith, J.M. Syslo, and P.J. White. 2019. Predatory fish invasion induces within and across ecosystem effects in Yellowstone National Park. Science Advances 5:eaav1139.
- Land & Water Consulting, Inc., Missoula, MT., 2002, Montana Dept. of Transportation Wetland Mitigation Monitoring Report, Year 2001: Cow Coulee, Townsend, Montana. Proj. No. 130091.013. July 2002. In 2001 Wetland Mitigation Monitoring Reports, Vol. I.
- Land & Water Consulting, Inc., Missoula, MT., 2002, Montana Dept. of Transportation Wetland Mitigation Monitoring Report, Year 2002: Stillwater River, Absarokee, Montana. Proj. No. 130091.032. February 2003. In 2002 Wetland Mitigation Monitoring Reports, Vol. II.
- LaVelle, Darlene. 1988. 1988 Nongame surveys in Region 5 and Region 7.' MTFWP. 40pp.
- Lenard, S. 2006. Birds of Blaine County, Riparian Point Count Surveys 2005. Report to the Bureau of LandManagement, Havre Field Station, Havre, Montana. Montana Natural Heritage Program, Helena, MT. 16pp.plus appendices.
- 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.
- Lundquist, A. 1932. The cormorants of South Dakota. The Wilson Bull., 44: 227-230.
- McLeod, J.A. and G.F. Bondar. 1953. A brief tudy of the Double-crested Cormorant on Lake Winnipegosis. Can. Field-Nat., 67(1): 1-11.
- Mitchell, R.M. 1977. Breeding biology of the double-crested cormorant on Utah lake. Great Basin Nat. 37:1-23.
- Montana Bird Distribution Committee. 2012. P.D. Skaar's Montana bird distribution. 7th Edition. Montana Audubon, Helena, Montana. 208 pp. + foldout map.
- Montana Dept. of Fish, Wildlife and Parks. Region Four., 1996, Draft Environmental Analysis for Weed Management.
- Mora, M. A. 1995. Residues and trends of organochloride pesticide and polychlorinated biphenyls in birds from Texas, 1965-88. Technical Report 14. Washington, D.C.: U.S.D.I. National Biological Service. 26 p.
- 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.
- Palmer, R.S. 1962. Handbook of North American birds. Volume 1. Loons through flamingos. Yale University Press, New Haven. 567 pp.
- Powder River Eagle Studies, Inc., Gillette, WY., 1999, Spring Creek Mine 1998 Wildlife Monitoring. March 1999.
- Reichel, J. D. 1996. Preliminary colonial nesting bird survey on the Bureau of Land Management Lewistown District: 1995. Unpublished report, U.S. Bureau of Land Management, Lewistown, Montana.
- Reinhart, D.P. 1990. Grizzly bear habitat use on cutthroat trout spawning streams in tributaries of Yellowstone Lake. M.Sc. Thesis. Bozeman, MT: Montana State University. 128 p.
- Rundquist, V.M. 1973. Avian ecology on stock ponds in two vegetational types in north-central Montana. Ph.D. Dissertation. Bozeman, MT: Montana State University. 112 p.
- Sater, S. 2022. The insects of Sevenmile Creek, a pictorial guide to their diversity and ecology. Undergraduate Thesis. Helena, MT: Carroll College. 242 p.
- 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.
- Stewart, R.E. 1975. Breeding birds of North Dakota. Tri-College Center for Environmental Studies, Fargo, North Dakota. 295 pp.
- Swan River National Wildlife Refuge. 1982. Birds of the Swan River NWR. Kalispell, MT: NW MT Fish and Wildlife Center pamphlet.
- Thompson, L.S. 1981. Circle West wildlife monitoring study: Third annual report. Technical report No. 8. Montana Department of Natural Resources and Conservation. Helena, Montana.
- 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.
- Vermeer, K. 1973. Great Blue Heron and Double-crested Cormorant colonies in the prairie provinces. Can. Field-Nat. 87:427-432.
- VTN Colorado, Inc. Decker Coal Company., 1975, Draft environmental impact assessment for the proposed North Extension of the West Decker Mine.
- Waage, Bruce C., 1999, Western Energy Company Rosebud Mine, Colstrip, Montana: 1998 Annual Wildlife Monitoring Report; December 1, 1997 - November 30, 1998 Survey Period. February 24, 1999.
- 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.
- Web Search Engines for Articles on "Double-crested Cormorant"
- Additional Sources of Information Related to "Birds"
