Knot

Knot is the name of two species of wading birds of the Northern Hemisphere. One species, the red knot, breeds on dry, stony places throughout the Arctic tundra. In summer, it has a brick-red face and underparts, but in winter its underparts are white. It spends winter in coastal areas as far away as Australia and New Zealand. In flight, a flock looks alternately light and dark as the birds wheel around in tight formation showing their white underparts then dark upperparts. On their winter feeding grounds, red knots move rapidly along the shore in search of crustaceans, insects, mollusks, and worms.

Red knot
Red knot

The great knot breeds in northeastern Siberia. It spends the winter in China, India, and Australia.

Great knot
Great knot