Feeding Behavior

Forages in shallow water by up-ending with tail up and head down, or by submerging head and neck while swimming, finding most food in underwater mud. Also forages by walking on land.

Eggs

7-10, sometimes 6-12. Pale olive. Incubation is by female only, 21-25 days. Young: female leads young from nest within a few hours after they hatch. Young feed themselves. Capable of flight at 38-52 days after hatching; in far north, where continuous daylight allows for feeding at all hours, young may develop faster.

Young

female leads young from nest within a few hours after they hatch. Young feed themselves. Capable of flight at 38-52 days after hatching; in far north, where continuous daylight allows for feeding at all hours, young may develop faster.

Diet

Mostly seeds, insects. Diet mostly plant material in fall and winter, especially seeds of grasses, sedges, pondweeds, and others, and waste grain in fields. In spring and summer also feeds on roots and new growth. More animal matter in summer, mainly insects, mollusks, crustaceans; sometimes tadpoles, small fish. Young ducklings eat mostly insects.

Nesting

Pair formation begins on winter range and continues during spring migration, with some birds perhaps not paired until after arrival on breeding grounds. Several males often court one female, leading to pursuit flights. Nest site is on dry ground among short vegetation, usually near water but can be up to 1/2 mile away; often more exposed than nests of other ducks. Nest (built by female) a shallow depression lined with grasses, twigs, leaves, with addition of down.