Guide to North American Birds

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Photo: Glenn Bartley/Vireo

Dunlin

Calidris alpina

The name, first applied long ago, simply means "little dun-colored (gray-brown) bird," a good description of the Dunlin in winter plumage. Spending the winter farther north than most of its relatives, this species is a familiar sight along the outer beaches during the cold months, as far north as New England and even southern Alaska. It is often in large flocks; in flight, these flocks may twist and bank in unison, in impressive aerial maneuvers. In breeding plumage, the Dunlin is so much more brightly colored as to seem like a different bird.

Conservation status	Numbers wintering in some coastal areas have declined noticeably since the 1970s; the reasons for this are unknown.
Family	Sandpipers
Habitat	Tidal flats, beaches, muddy pools; wet tundra in summer. During migration and winter, widespread in coastal habitats; mainly mudflats, but also sand beaches, rocky shores. Inland, occurs on lake shores, sewage ponds, flooded fields. Breeds on wet tundra, especially areas with hummocks, tussocks, and low ridges interspersed with ponds and marshy spots.

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Feeding Behavior

Forages by picking at items on surface or by probing in mud, sometimes with very rapid "stitching" motion, probing several times per second. May feed by day or night.

Eggs

4, sometimes 2-3, perhaps very rarely more than 4. Olive or blue-green to buff, with brown blotches concentrated at larger end. Incubation is by both sexes (mostly female during night, male during day), 20-24 days. Young: Downy young leave nest soon after hatching. Both parents tend young at first, but female often departs after a few days. Young feed themselves, are able to fly at age of 19-21 days.

Young

Downy young leave nest soon after hatching. Both parents tend young at first, but female often departs after a few days. Young feed themselves, are able to fly at age of 19-21 days.

Diet

Mostly insects on tundra, other small invertebrates on coast. Diet varies with season and location. On breeding grounds feeds heavily on insects, including midges, crane flies, beetles, and others. On coast eats wide variety of small creatures found in intertidal zone, including marine worms, snails and other mollusks, amphipods and other crustaceans, sometimes small fish. Sometimes eats seeds and leaves.

Nesting

In display flight, male circles slowly over breeding territory, fluttering and gliding, while singing. On ground, reacts to intruding males by advancing, pausing to raise one wing high over back. Courtship may involve ritualized nest-making movements. Nest site is on ground, usually well hidden in or under grass clump or in hummock. Nest is a shallow scrape, lined with leaves and grass. Both sexes make scrapes, but female chooses one and completes nest.

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

Migration

A short-distance migrant, wintering commonly on North American coast, almost never reaching the Equator. Generally a much later fall migrant than most shorebirds.

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Migration

A short-distance migrant, wintering commonly on North American coast, almost never reaching the Equator. Generally a much later fall migrant than most shorebirds.

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

Songs and Calls

A soft cheerp or chit-lit.

Audio © Lang Elliott, Bob McGuire, Kevin Colver, Martyn Stewart and others.
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How climate change could affect this bird's range

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.

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