Breeding adult. Photo: Mick Thompson/Flickr (CC BY NC 2.0)
Calidris mauri
| Conservation status | Still abundant, but vulnerable because high percentage of population may stop during migration at a few key points, such as Copper River Delta in Alaska. Declining numbers of migrants have been documented in some areas. |
|---|---|
| Family | Sandpipers |
| Habitat | Shores, beaches, mudflats; in summer, dry tundra. Migrants and wintering birds are typically on open shorelines, mudflats, sandy beaches, tidal estuaries. In winter mostly along coast, few remaining inland then. Breeds on tundra slopes, choosing dry sites with low shrub layer and with marshes nearby for feeding. |
Forages by walking in shallow water or on mud and probing in mud with bill; also feeds by searching visually and picking up items from surface of shore.
4, sometimes 3, perhaps rarely 5. Whitish to brown, with darker brown spots. Incubation is by both parents, about 21 days. At first, female incubates from late afternoon to mid-morning, male only during mid-day, but male's proportion increases later. Female sometimes departs before eggs hatch. Young: Downy young leave nest a few hours after hatching. Sometimes both parents care for the chicks, but often the female deserts them after a few days, leaving the male to care for the young. Young feed themselves. Age at first flight about 17-21 days.
Downy young leave nest a few hours after hatching. Sometimes both parents care for the chicks, but often the female deserts them after a few days, leaving the male to care for the young. Young feed themselves. Age at first flight about 17-21 days.
Includes insects, crustaceans, mollusks, marine worms. On breeding grounds, eats mostly flies and beetles, also other insects, spiders, small crustaceans. Diet in migration and winter varies. On coast eats many amphipods and other crustaceans, small mollusks, marine worms, insects. Inland migrants eat mostly insects, some seeds.
Male sings while performing display flight over breeding territory. On ground, unmated male approaches female in hunched posture, tail raised over back; repeatedly gives trilled call. Nest site is on ground, usually under low shrub or grass clump. Nest is shallow depression with sparse lining of sedges, leaves, lichens. Male makes several nest scrapes, female chooses one.
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.
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