Surfbird

Overview

The Surfbird is an unusual shorebird that breeds far from the coast, on remote alpine tundra in Alaska and the Yukon, yet spends the rest of the year almost exclusively on rocky, surf-battered Pacific shorelines, from which it takes its name. It is often found alongside turnstones and Rock Sandpipers on wave-washed rocks.

Feathers are found almost entirely along rocky Pacific coastlines, where the species forages amid crashing surf.

Feather Identification

• Tail feathers: a broad, well-defined blackish terminal band contrasting with a white base, one of the most distinctive feather features of this species.
• Breeding underparts: heavily marked with dark chevron-shaped spots across a whitish base, giving a boldly patterned look.
• Upperparts: mottled gray, black, and rufous-edged feathers in breeding plumage, becoming plainer gray in winter.
• Nonbreeding feathers: plain gray above and whitish below with some dusky mottling on the breast, less boldly marked than in breeding plumage.
• Versus Rock Sandpiper/turnstones: the bold black-and-white tail band is a strong distinguishing feature not shared by Rock Sandpiper, which lacks such a sharply defined tail pattern.

Plumage Notes

Breeding adults show heavily spotted and chevron-marked underparts along with mottled gray, black, and rufous upperparts; sexes look alike. Nonbreeding adults become much plainer, with uniform gray upperparts and only light dusky mottling on the breast, though the bold black tail band persists year-round.

Juveniles show neatly scaled upperpart feathers with pale fringes, intermediate in pattern between breeding and nonbreeding adults. Molt into nonbreeding plumage occurs after the birds reach wintering rocky shorelines in autumn.

Habitat & Range

Surfbirds breed on remote alpine tundra in mountainous parts of Alaska and adjacent Yukon, far from any coastline. Outside the breeding season they migrate to rocky Pacific shorelines, wintering from southern Alaska south through the west coast of North America to southern South America, always closely tied to rocky, wave-exposed habitat.

Behavior & Field Notes

Surfbirds forage on wave-splashed rocks, jetties, and reefs, picking invertebrates from wet rock surfaces, often in mixed flocks with turnstones and Rock Sandpipers. They are notably tolerant of rough surf conditions, foraging right at the waterline as waves break.

Nests are simple scrapes on high alpine tundra, an unusually inland and elevated breeding habitat for a shorebird that spends the rest of the year on ocean rocks. The flight call is a shrill, thin whistle. Because of its strict rocky-coast habitat preference, Surfbird feathers are essentially confined to Pacific rocky shorelines outside the brief alpine breeding season.