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Northern Prairie Wildlife Research Center

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Forest and Rangeland Birds of the United States

Natural History and Habitat Use

Northern Shoveler -- Anas clypeata


RANGE: Breeds from northern Alaska to northern Manitoba, south to northwestern and eastern Oregon, northern Utah, Colorado, Nebraska, and Missouri, and central Wisconsin. Winters from the coast of southern British Columbia to central Arizona east to the Gulf Coast and South Carolina on the Atlantic Coast south to South America.

STATUS: Fairly common; more abundant west of the Mississippi River.

HABITAT: Prefers shallow prairie marshes, particularly those with abundant plant and animal life floating on the surface, but also occupies potholes, sloughs, and marshes in taiga, forests, and (less commonly) cultivated country. It tolerates a wide range of water conditions, from clean and clear to muddy; flowing to stagnant; considerably alkaline, and even heavily polluted. Likes to have mudbanks or low sloping shorelines with short or flattened vegetation for loafing. Winters in freshwater and brackish habitats.

SPECIAL HABITAT REQUIREMENTS: Shallow waters with muddy bottoms, surrounded by dry grassy areas for nesting.

NEST: Nests on dry ground in a slight hollow, preferably in short grasses within 300 feet of water, but will nest in hayfields, meadows, and rarely bulrushes if grasses are not available. Seldom nests in weed patches, and avoids woody vegetation such as willows.

FOOD: A filter feeder; prefers to feed in shallow waters, but will actively feed in deep waters containing submergent and surface vegetation. Consumes a considerable amount of microscopic animal life such as ostracods, copepods, and similar crustaceans, and macroscopic animal life as well. Eats fingernail clams, mollusks, and insects for one quarter of the diet. Also eats grasses, sedges, water lilies, pondweeds, bulrush seeds, algae, and smartweeds.

REFERENCES: Bellrose 1976, DeGraff et al. 1980, Johnsgard 1975b, Palmer 1976a, Poston 1974.


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