The Red Knot breeds at widely scattered locations in the high Arctic from Siberia east to Canada and Greenland. After the breeding season, they migrate south with much of the population wintering in Argentina, Western Europe, Africa, Australia and New Zealand. Small numbers winter along the southern coasts of the United States, particularly in Florida.
In Florida, this species winters along the coasts, varying in numbers from rare to abundant. They usually arrive in late July through August and depart in April-