Guide to North American Birds

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Photo: Karen Bonsell/Great Backyard Bird Count

Mallard

Anas platyrhynchos

Abundant over most of the northern hemisphere, the Mallard is the most familiar wild duck to many people, and the ancestor of most strains of domesticated ducks. In many places this species has managed to domesticate itself, relying on handouts in city parks. Although barnyard and feral ducks may be dumpy and ungainly creatures, the ancestral wild Mallard is a trim, elegant, wary, fast-flying bird.

Conservation status	Still one of the most abundant ducks in the world. Numbers fluctuate considerably, and population of northern Great Plains is probably permanently reduced from historical levels. Status of wild birds is clouded by large number of feral populations.
Family	Ducks and Geese
Habitat	Marshes, wooded swamps, grain fields, ponds, rivers, lakes, bays, city parks. May occur in any kind of aquatic habitat, but favors fresh water at all seasons; only sparingly on coastal waters, mainly in winter on sheltered bays and estuaries. Most abundant in summer on prairie potholes and in semi-open country north of the prairies. Most abundant in winter on swamps and lakes in lower Mississippi Valley.

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Feeding Behavior

forages in water by dabbling, submerging head and neck, up-ending, rarely by diving; forages on land by grazing, plucking seeds, grubbing for roots.

Eggs

7-10, sometimes 5-15. Whitish to olive buff. Incubation is by female, 26-30 days. Young: Leave nest within a day after hatching, are led to water by female. Young are tended by female but feed themselves. Age at first flight 52-60 days. 1 brood per year, perhaps rarely 2.

Young

Leave nest within a day after hatching, are led to water by female. Young are tended by female but feed themselves. Age at first flight 52-60 days. 1 brood per year, perhaps rarely 2.

Diet

omnivorous. Majority of diet is plant material, including seeds, stems, and roots of a vast variety of different plants, especially sedges, grasses, pondweeds, smartweeds, many others; also acorns and other tree seeds, various kinds of waste grain. Also eat insects, crustaceans, mollusks, tadpoles, frogs, earthworms, small fish. Young ducklings may eat mostly aquatic insects.

Nesting

Pairs form in fall and winter. Displays of male include dipping bill in water and then rearing up, giving whistle and grunt calls as he settles back on water; raising head and tail while giving sharp call; plunging forepart of body deep in water and then flinging up water with bill. Nest: Female, accompanied by male, seeks and chooses site for nest. Site may be more than 1 mile from water; usually on ground among concealing vegetation, but may be on stump, in tree hollow, in basket above water, various other possibilities. Nest is shallow bowl of plant material gathered at the site, lined with down.

Illustration © David Allen Sibley.
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Text © Kenn Kaufman, adapted from
Lives of North American Birds

Migration

Fall migration extends over long period; migrates relatively early in spring. Since pairs form in fall and winter, male probably follows female to breeding areas. Feral populations may be permanent residents, but all wild Mallards in North America are probably migratory.

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Migration

All Seasons - Common
All Seasons - Uncommon
Breeding - Common
Breeding - Uncommon
Winter - Common
Winter - Uncommon
Migration - Common
Migration - Uncommon

Songs and Calls

Male utters soft, reedy notes; female, a loud quack.

Audio © Lang Elliott, Bob McGuire, Kevin Colver, Martyn Stewart and others.
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How Climate Change Will Reshape the Range of the Mallard

Audubon’s scientists have used 140 million bird observations and sophisticated climate models to project how climate change will affect this bird’s range in the future.

Zoom in to see how this species’s current range will shift, expand, and contract under increased global temperatures.

Climate threats facing the Mallard

Choose a temperature scenario below to see which threats will affect this species as warming increases. The same climate change-driven threats that put birds at risk will affect other wildlife and people, too.