Breeding plumage. Note: barred breast/belly and rufous cheeks.
  • Breeding plumage. Note: barred breast/belly and rufous cheeks.

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Stilt Sandpiper

Calidris himantopus
Charadriiformes
This is a large and highly varied group of birds that do not have many outward similarities. Most are water birds that feed on invertebrates or small aquatic creatures. The order is well represented in Washington, with seven families:
Scolopacidae
This large and diverse family of shorebirds is made up mostly of northern breeders that migrate long distances. Their highly migratory nature leads them astray fairly frequently, and rarities often show up outside their normal range. Many of these mostly coastal birds forage in relation to the tides, rather than the time of day. They use a variety of foraging techniques, but the most common techniques are picking food from the ground or water, or probing into wet sand or mud. Those that probe generally have sensitive bills that open at the tips. Most members of this group eat small invertebrates. Many make dramatic, aerial display-flights during courtship. Nesting practices vary, but both parents typically help raise the young. Clutch size is usually four, and both parents generally incubate. The young are precocial and leave the nest within a day of the hatching of the last chick. Most feed themselves, although the parents generally tend the young for a varying period of time. The female typically abandons the group first, leaving the male to care for the young until they are independent.
Rare fall migrant.
  • Species of Concern

General Description

Often described as looking like a yellowlegs and feeding like a dowitcher, the Stilt Sandpiper is a medium-sized, long-legged wader. Its breeding plumage is distinctive, but rarely seen in Washington. It is heavily barred brown-and-white above and below, with a white eye-line that separates a rufous cap and cheek. In non-breeding plumage, the Stilt Sandpiper is pale gray, with a light, unstreaked belly and white eye-line. Juveniles are light brownish-gray with lightly streaked breasts and scaled backs. In flight, they show gray and white underwings, solid gray upperwings, white rumps, and gray tails.

Habitat

Stilt Sandpipers' breeding grounds are in the Arctic tundra, north of the tree line. They nest in wet sedge-meadows with raised ridges and hummocks. During the non-breeding season, they are usually found in fresh water ponds, marshes, lagoons, and flooded fields.

Behavior

Large flocks of Stilt Sandpipers are common in areas where they are abundant, but in Washington, single birds or a few birds are generally seen mixed with flocks of dowitchers or Lesser Yellowlegs. Stilt Sandpipers usually forage in shallow water up to their bellies. They probe in the mud for food, often moving their heads up and down, sometimes under water, in a sewing-machine motion like that of a dowitcher. They also pick food from the surface of the water.

Diet

Stilt Sandpipers eat a wide variety of insects and insect larvae during the breeding season. At other times of the year, they eat seeds, leaves, and roots of aquatic plants, marine worms, and other aquatic invertebrates.

Nesting

Stilt Sandpipers generally don't breed until they are two years old. Males arrive on the breeding grounds a few days before females. Pairs form once the females arrive. The male makes a few scrapes in a dry spot on the ground, often on a ridge or hummock of sedge, surrounded by water. The female then chooses one of the scrapes for the nest. The nest may be sparsely lined with sedge leaves. Both parents incubate the four eggs for 19 to 21 days. The young leave the nest within a day of hatching and find their own food. Both parents tend the young at first, but the female usually leaves within seven days. The male stays with the young for 10 to 14 days, but abandons the young before they can fly well, at 17 to 18 days. Each pair raises only one brood per season.

Migration Status

These long-distance travelers migrate through the Great Plains on both their northward and southward routes. They winter as far south as northern South America, although a few can be found wintering in the southern United States. During the fall migration, when juveniles follow about a month behind adults, the migration route is spread out, and some birds stray as far as the West Coast.

Conservation Status

The Canadian Wildlife Service estimates the population of Stilt Sandpipers at 200,000 birds. Populations in some areas have declined, while others have increased. The range-wide status of the population is unknown. This species has a limited and disconnected breeding range, and degradation of some of that habitat is of conservation concern. Changes in land use on South American wintering grounds are also of concern, because some winter gathering spots are being developed. Stilt Sandpipers are listed on the Partners in Flight watch list because of their narrow breeding and wintering distributions, relatively small population, and unknown trends in population.

When and Where to Find in Washington

Stilt Sandpipers are rare in Puget Sound and coastal Washington from mid-June through September, with occasional sightings before and after. In eastern Washington, they are rarely reported from early July through September, with scattered later sightings.

Abundance Code DefinitionsAbundance

C=Common; F=Fairly Common; U=Uncommon; R=Rare; I=Irregular
EcoregionJanFebMarAprMayJunJulAugSepOctNovDec
Oceanic
Pacific Northwest Coast RR
Puget Trough RR
North Cascades
West Cascades
East Cascades
Okanogan
Canadian Rockies
Blue Mountains
Columbia Plateau RRR

Washington Range Map

North American Range Map

North America map legend

Federal Endangered Species ListAudubon/American Bird Conservancy Watch ListState Endangered Species ListAudubon Washington Vulnerable Birds List
Yellow List

View full list of Washington State's Species of Special Concern