Great Knot

Overview

The Great Knot is the largest member of the knot group, breeding in isolated mountain tundra of northeastern Siberia and migrating along the East Asian-Australasian Flyway to spend the winter on the coasts of South and Southeast Asia and Australia. It is somewhat larger, longer-billed, and more heavily marked below than the more widespread Red Knot.

Feathers are typically encountered at major intertidal staging sites along the flyway, where enormous flocks gather during migration.

Feather Identification

• Breast feathers: densely covered in bold blackish spots and chevrons in breeding plumage, more heavily marked than any Red Knot underparts feather.
• Upperparts: mottled gray-brown and rufous-edged feathers in breeding plumage, becoming scaly gray-brown in winter.
• Bill-associated size clue: overall feather size is larger than Red Knot, consistent with the species' notably longer, heavier bill and larger body.
• Wing feathers: dark gray-brown with a modest pale wingbar.
• Versus Red Knot: Great Knot feathers are larger overall and the breeding breast pattern is spotted/blotched black rather than washed red, a key distinction where ranges might overlap.

Plumage Notes

Breeding adults show a heavily spotted, blackish breast patch contrasting with white flanks, plus rufous-and-black mottled upperparts; sexes look alike. Nonbreeding adults become plain scaly gray-brown above and whitish below, losing the bold breast spotting.

Juveniles show neatly scaled upperpart feathers with pale fringes, somewhat similar to nonbreeding adults but with crisper feather edges. Adults undergo a complete molt largely after reaching wintering areas, while a partial molt produces the spotted breeding plumage before spring migration north.

Habitat & Range

Great Knots breed in a restricted range of mountainous tundra in far northeastern Siberia. They migrate along the East Asian-Australasian Flyway, staging at critical intertidal mudflats in the Yellow Sea region, and winter primarily on the coasts of South and Southeast Asia and Australia.

Behavior & Field Notes

Great Knots forage on open intertidal mudflats, probing for small invertebrates, and are known for forming some of the largest single-species shorebird flocks in the world at key Yellow Sea staging sites. They rely heavily on a small number of critical stopover locations, making them vulnerable to habitat loss along the flyway.

Nests are simple scrapes on tundra or rocky mountain terrain. The flight call is a low, nasal note. Feather finds are concentrated at major intertidal staging areas in East and Southeast Asia during migration periods.