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Mallard - Anas platyrhynchos
Native Species
Global Rank :
G5
State Rank :
S5
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
Medium sized dabbling duck with stocky build. Length: 50 to 65cm; mass: 1000 to 1300 g. Strongly sexually dimorphic. Adult male in breeding plumage has dark-green head, narrow white neck-ring, chestnut-brown breast, brownish-gray upperparts, grayish underparts, black rump and under tail-coverts, white outer tail-feathers and strongly recurved black central tail-feathers. In basic plumage, held briefly in late summer, the male retains its solid dark-greenish crown, warm-brown breast, darker upperparts, and slight upturned central tail-feathers.. Female plumage is similar year-round. Has broken streaky pattern of buff, white, gray, or black on brown feathers, white outer tail-feathers, contrastingly pale belly and under tail-covets and prominent dark eyeline. Juvenal plumage similar to female but averages darker, with notched tail feathers (Drilling, Tittman, and McKinney 2002).
The majority of domestic duck breeds are of Mallard (
Anas platyrhynchos ) origin, but they are easily distinguishable from the wild Mallard by their heavier bodies.
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
Observations in Montana Natural Heritage Program Database
Number of Observations: 44416
(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
In the Bozeman area, normal migration occurs from February 25 to April 20 and from October 15 to January 1, with peaks on March 20 and December 1 (Skaar 1969).
Habitat
In North America, the Mallard is the most abundant duck species. Its success in the wild reflects its adaptability to varied habitats, its hardiness in cold climates, and tolerance of human activities. Usual nest site is in uplands close to water. Nests in wide variety of situations with dense cover, including grasslands, marshes, bogs, riverine floodplains, dikes, roadside ditches, pastures, cropland, shrubland, fence lines, rock piles, forests, and fragments of cover around farmsteads (Drilling, Tittman, and McKinney 2002). Comments on habitat are in Holm (1984).
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.
Food Habits
Omnivorous. Very flexible in food choice; diet composition depends on stage of annual cycle, hydrological conditions, invertebrate behavior, and crop-harvesting schedule (Drilling, Tittman, and McKinney 2002).
Ecology
At Freezeout Lake, the most common cause of nest failure was skunk predation. Brood movements in southeast Montana tended to be from bare ponds to those with emergent vegetation, from small to larger ponds, and to ponds with a lower water loss rate.
Reproductive Characteristics
Active nests have been found from April 15 to July 21, and hatching dates have been reported for May 10 to August 10. Clutch size averages about 7 for Freezeout Lake and the Fortine area; brood size averages 5.4 on pastures in north-central Montana.
Stewardship Responsibility
References
Literature Cited AboveLegend: View Online Publication Drilling, N., R. Titman, and F. McKinney. 2002. Mallard (Anas platyrhynchos). In The birds of North America, No. 658 (A. Poole and F. Gill, Eds.). Academy of Natural Sciences of Philadelphia and American Ornithologists’ Union. Holm, I. 1984. Hatching success of upland nesting ducks in north central Montana in relation to vegetation cover. M.S. thesis, University of Montana, Missoula. Marks, J.S., P. Hendricks, and D. Casey. 2016. Birds of Montana. Arrington, VA. Buteo Books. 659 pages. 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.
Additional ReferencesLegend: View Online Publication Do you know of a citation we're missing? [WWPC] Washington Water Power Company. 1995. 1994 wildlife report Noxon Rapids and Cabinet Gorge Reservoirs. Washington Water Power Company. Spokane, WA. American Ornithologists’ Union [AOU]. 1998. Check-list of North American birds, 7th edition. American Ornithologists’ Union, Washington, D.C. 829 p. Bayless, S.R. 1992. Duck population responses to water development in north central Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 69 p. Berg, P.F. 1955. A study of waterfowl broods in Eastern Montana with special reference to movements and the relationship of reservoir fencing to production. M.Sc. Thesis. Bozeman, MT: Montana State University. 31 p. 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. Butler, M.A. 1996. The validity of using artificial nests to assess nest-predation rates in prairie nesting ducks. M.Sc. Thesis. Bozeman, MT: Montana State University. 82 p. Cameron, E. S. 1907. The birds of Custer and Dawson counties, Montana. Auk 24(3): 241-270. Carlsen, T.L. 1984. Waterfowl nesting on islands in two ponds of the Canyon Ferry Wildlife Management Area, Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 91 p. Casagranda, L.G. 1955. A study of beaver-waterfowl relations in the mountainous area of Beaverhead County, Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 33 p. 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. Clawson, M.R. 199. An investigation of factors that may affect nest success in CRP lands and other grassland habitats in an agricultural landscape. M.Sc. Thesis. Bozeman, MT: Montana State University. 45 p. 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. Cornely, J.E. 1982. Waterfowl production at Malheur National Wildlife Refuge, 1942-1980. Transactions of the 47th North American Wildlife and Natural Resources Conference. pp 559-571. Cowardin, L. M., D. S. Gilmer, and C. W. Shaiffer. 1985. Mallard recruitment in the agricultural environment of North Dakota. Wildlife Monographs No. 92. Decker Coal Company., 1979?, West Decker 5 Year Permit: Avian research and mitigation. In 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. 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. Duebbert, H.F., J.T. Lokemoen, and D.E. Sharp. 1983. Concentrated nesting of Mallards and Gadwalls on Miller Lake Island, North Dakota. J. Wildl. Manage. 47(5): 729-740. 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, 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. 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. Ellig, L.J. 1953. Waterfowl relationships to Greenfields Lake, Teton County, Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 49 p. Fields, S.P. 2011. Factors influencing the density and distribution of breeding waterfowl in north-central Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 112 p. Funk, H. D., J. R. Grieb, G. F. Wrakestraw, and D. Witt. 1968. A proposed mallard drake season in central flyway Montana, Wyoming and Colorado. Central Flyway Tech. Comm. Rep., July. 12 pp. Girard, G. L. 1941. The Mallard: Its management in western Montana. Journal of Wildlife Management 5:233-259. Gjersing, F.M. 1971. A study of waterfowl production on two rest rotation grazing units in northcentral Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 42 p. Gniadek, S. 1983. Southwest Glendive Wildlife Baseline Inventory. Miles City, Mont: Bureau of Land Management, Miles City District Office. 56 pp with appendices. Godwin, P.R. and D.E. Joyner. 1981. Pond ecology and its influence on Mallard use in Ontario, Canada. Wildfowl 32:20-34. Golden Sunlight Mines, Inc. 2000. Golden Sunlight Mines, Inc., Whitehall, MT. Annual Permit Reports. Goodell, J. 2012. Morse Land Company Breeding Bird Inventory And Analysis. High Desert Museum. Bend, OR. 42 pp + Appendices. Grieb, J. R., H. D. Funk, R. M. Hopper, G. F. Wrakestraw, and D. Witt. 1970. Evaluation of the 1968-1969 experimental mallard drake season in Montana, Wyoming and Colorado. Trans. No. Am. WildI. and Nat. Res. Conf. 35: 136-148. 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. Hendricks, P, S. Lenard, and C. Currier. 2012. Grassland Bird Surveys in North Valley County and Northwest Phillips County, Montana: 2011 Summary. Report to the USDI Bureau of Land Management. Montana Natural Heritage Program. Helena, MT. 7pp. 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. A faunal survey of the Centennial Valley Sandhills, Beaverhead County, Montana. Report to the U.S. Bureau of Land Management and U.S. Fish and Wildlife Service. Montana Natural Heritage Program, Helena, MT. 44 p. Hendricks, P., G.M. Kudray, S. Lenard, and B.A. Maxell. 2007. A Multi-Scale Analysis Linking Prairie Breeding Birds to Site and Landscape Factors Including USGS GAP Data. Helena, Mont: Montana Natural Heritage Program. Hendricks, P., S. Lenard, C. Currier, and J. Carlson. 2007. Grassland bird surveys in north Valley County, Montana: 2001-2006. Report to the Bureau of Land Management, Glasgow Field Office. Montana Natural Heritage Program, Helena, Montana. 19 pp. plus appendices. Hendricks, P., S. Lenard, C. Currier, B. A. Maxell, and J. Carlson. 2008. Surveys for grassland birds of the Malta Field Office-BLM, including a seven-year study in north Valley County. Montana Natural Heritage Program, Helena. Hendricks, P., S. Lenard, D.M. Stagliano, and B.A. Maxell. 2013. Baseline nongame wildlife surveys on the Fort Peck Indian Reservation. Report to the Assiniboine and Sioux Tribes of the Fort Peck Indian Reservation. Montana Natural Heritage Program, Helena, MT. 83 p. Herbert, J.T. 1977. An inventory of the bird population within the Sarpy Creek drainage, southeastern Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 81 p. Hinz, T. C. 1984. Where have all the mallards gone?: an overview of the problems of low waterfowl recruitment on the North American prairies. P. 10 in A. Dood, comp., Agriculture and wildlife. Proc. Mont. Chapt., The WildI. Soc., Butte. 85 pp. Hudson, M.S. 1980. Waterfowl production on three age-classes of stock ponds in north central Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 45 p. Johnsgard, P.A. 1975. Waterfowl of North America. Bloomington, IN: Indiana University Press. 575 p. 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. Johnson, D.H. and J.W. Grier. 1988. Determinants of breeding and distributions of ducks. Wildl. Monogr. 100: 1-37. Johnson, K.M. 1990. Aquatic vegetation, salinity, aquatic invertebrates, and duck brood use at Bowdoin National Wildlife Refuge, Montana. M.Sc. Thesis. Bozeman, MT: Montana State University. 77 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. Joslin, Gayle. 1980. Wildlife inventory and hard rock mining impact analysis of the West Cabinet Mountains and Lake Creek Valley, Lincoln County, Montana. MTFWP 91 pgs + 47 pgs app. Klett, A.T., T.L. Shaiffer, and D.H. Johnson. 1988. Duck nest success in the Prairie Pothole Region. J. Wildl. Manage. 52(3): 431-440. Knight, R.R. 1960. Vegetative characteristics of two water areas in Teton County, Montana, in relation to waterfowl usage. M.Sc. Thesis. Bozeman, MT: Montana State University. 38 p. Knight, R.R. 1965. Vegetative characteristics and waterfowl usage of a Montana water area. J. Wildl. Manage. 29(4):782-788. Knopf, F.L. 1986. Changing landscapes and the cosmopolitism of the eastern Colorado avifauna. Wildlife Society Bulletin 14(2):132-142. Korschgen, C.E., and R.B. Dahlgren. 1992. Human disturbances of waterfowl: causes, effects, and management. Ch. 13.2.15 In: Waterfowl Management Handbook. Fish and Wildlife Service Leaflet. 8 p. Lambing, J. H., D. A. Nimick, J. R. Knapton, and D. U. Palawski. 1994. Physical, chemical, and biological data for detailed study of the Sun River Irrigation Project, Freezout Lake Wildlife Management Area, and Benton Lake National Wildlife Refuge, west-central Montana, 1990-92, with selected data for 1987-89. Open-File Report 94-120, U.S. Geological Survey, Helena, Montana. Land & Water Consulting, Inc., Missoula, MT., 2002, Montana Dept. of Transportation Wetland Mitigation Monitoring Report, Year 2001: Lawrence Park, Kalispell, Montana. Proj. No. 130091.008. July 2002. In 2001 Wetland Mitigation Monitoring Reports, Vol. I. 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Fish and Wildlife Service Leaflet. 7 p. Lokemoen, J.T. and D.E. Sharp. 1985. Assessment of nasal marker materials and designs used on dabbling ducks. Wildlife Society Bulletin 13:53-56. Lokemoen, J.T., and R.O. Woodward. 1992. Nesting waterfowl and water birds on natural islands in the Dakotas and Montana. Wildlife Society Bulletin 20:163-171. Lokemoen, J.T., H.F. Duebbert, and D.E. Sharp. 1990. Homing and reproductive habits of mallards, gadwalls, and blue-winged teal. Wildlife Monographs 106:1-28. Lorang, K.D. 1979. Waterfowl and hunter use of Freezeout Lake Game Management Area. M.Sc. Thesis. Bozeman, Montana: Montana State University. 79 p. Matthews, W.L. 1980a. Wibaux-Beach comparison study: Sydney, Glendive and Plevna Study Areas. Bureau of Land Management, Miles City, MT. 50 p. Matthews, W.L. 1981. Broadus-Pumpkin Creek baseline inventory - wildlife. Bureau of Land Management, Miles City, MT. 83 p. Maxell, B.A. 2016. 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Yale University Press, New Haven. 567 pp. Pavlacky Jr., D.C., et al. 2021. Landscape-scale conservation mitigates the biodiversity loss of grassland birds. Ecological Applications e2548. 17 p. Porter, D.K. and R.A. Ryder. 1972. Avian density and productivity studies and analyses on the Pawnee Site in 1972. Fort Collins, CO: Colorado State University. Unpublished report, Department of Fishery and Wildlife Biology. 77 p. Ralph, J.C., J.R. Sauer, and S. Droege. 1995. Monitoring bird populations by point counts. Gen. Tech. Rep. PSW-GTR-149. Albany, CA: USDA Pacific Southwest Research Station. 181 p. Rhodes, O.E., Jr., L.M. Smith and M.H. Smith. 1991. Conservation and genetic resources in waterfowl. Trans. N. Amer. Wildl. & Nat. Res. Conf. 56:462-472. Richmond, C.W. and F.H. Knowlton. 1894. Birds of south-central Montana. Auk 11:298-308. Rogers, R.R and A. Rogers. 1995. A survey of nesting ferruginous hawks (Buteo regalis) on public lands in Petroleum and Fergus counties, Montana. 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