The Great Knot is a small wading bird with no subspecies.
The giant Sandpiper feeds mainly on crustaceans, mollusks, insects, and insect larvae. Foraging often insert the mouth into the mud to find food, but also often along the water side of the shallow water or the water side of the sand and mud to walk while foraging.
Calidris mainly breeds in the tundra of northern Siberia and breeds from June to August. The nest is a hollow pit in the ground covered with dead grass and moss, usually in grass near water or under thicket of willows and short birch trees. Each brood lays 4 eggs. The eggs are grayish-yellow, covered with small spots of reddish-brown and cyan gray, and the blunt end has dark brown lines. The size of the eggs is 41-45 mm ×30-32 mm.
Listed on the IUCN Red List of Threatened Species (IUCN) ver 3.1:2015-2016 - Endangered (EN).
Listed in China's "National Key Protected Wildlife List" (February 5, 2021) Level 2.
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