Sanderling

Overview

The Sanderling is a small, energetic wading bird known for its distinct, rapid movements along sandy shorelines. As a long-distance migrant, it breeds in the High Arctic tundra and travels vast distances to winter along coastlines across the globe.

Appearance

This plump sandpiper is easily recognized by its pale, almost white non-breeding plumage, which features a dark shoulder patch. During the summer breeding season, the face and throat transition to a brick-red hue, while juveniles display a high-contrast, spangled black-and-white pattern. A key physical identifier is the absence of a hind toe, an adaptation that reduces drag during its signature fast-paced running. In flight, both adults and juveniles reveal a prominent, broad white wingbar.

Distribution & habitat

Sanderlings have a circumpolar breeding range, nesting on dry, stony Arctic tundra near wetlands. Outside of the breeding season, they are cosmopolitan, commonly found on sandy beaches, tidal mudflats, and occasionally rocky shores throughout South America, Africa, Europe, and Australia.

Biology & behavior

Highly gregarious when not breeding, Sanderlings often forage and roost in tight-knit flocks. They are famous for their "wind-up toy" behavior, where they dash back and forth along the surf line, chasing receding waves to snatch prey before darting away from incoming water.

Feeding

Using an extremely sensitive bill, they detect and probe for small invertebrates, including worms, crustaceans, and mollusks, hidden beneath the sand. Their foraging success is often tied to the timing of seasonally abundant resources, such as the eggs of horseshoe crabs at migratory stopovers.