Illustration © David Allen Sibley.
Learn more about these drawings.
Text © Kenn Kaufman, adapted from
Lives of North American Birds
Photo: Mark Eden/Great Backyard Bird Count Participant
Aythya collaris
Conservation status | Numbers apparently stable. Since about the 1930s, has become a much more widespread and numerous breeding bird in eastern Canada and northern New England. |
---|---|
Family | Ducks and Geese |
Habitat | Wooded lakes, ponds; in winter, also rivers, bays. In summer on freshwater marshes, ponds, and bogs, mainly in openings in forested country. In migration and winter on ponds, lakes, slow-moving rivers, sometimes on coastal estuaries, but generally not on saltwater bays. |
Forages by diving, usually in water a few feet deep. Also forages at surface and sometimes up-ends in shallows. Opportunistic, it may move into flooded fields to feed.
8-10, sometimes 6-14. Vary in color: olive-gray, pale brown, pale buff. Incubation is by female only, 25-29 days. Young: female leads young to water 12-24 hours after they hatch; young may return to nest at night. Unlike many diving ducks, female and brood often hide in marsh rather than seeking safety on open water. Young find their own food, are capable of flight 49-55 days after hatching. Female may remain with young until they are old enough to fly, unlike most ducks.
female leads young to water 12-24 hours after they hatch; young may return to nest at night. Unlike many diving ducks, female and brood often hide in marsh rather than seeking safety on open water. Young find their own food, are capable of flight 49-55 days after hatching. Female may remain with young until they are old enough to fly, unlike most ducks.
mostly aquatic plants, insects. Diet varies with season and habitat. Feeds on seeds, stems, and roots of many aquatic plants, including pondweeds, sedges, smartweeds, grasses, algae, and others. Also eats aquatic insects and mollusks. Young ducklings feed mainly on insects.
Pair formation activity begins in winter. Courtship displays by male include laying head far back and then thrusting it forward; also swimming with head feathers erected, nodding rapidly. Nest site is on dry hummock, clump of brush, or mat of floating vegetation, close to open water. Nest is shallow bowl of grasses, sedges, weeds, lined with down.
In the broadest and most detailed study of its kind, Audubon scientists have used hundreds of thousands of citizen-science observations and sophisticated climate models to predict how birds in the U.S. and Canada will react to climate change.
One birder's impassioned plea to name the diver for a much more obvious—and useful—field mark.
Pledge to continue to oppose drilling in the Arctic National Wildlife Refuge, one of the wildest places left in America.
Ask your members of Congress to oppose efforts to weaken the Endangered Species Act.
Let us send you the latest in bird and conservation news.