IUCN Conservation Status: Least Concern
Christopher L. Wood
The Red Knot is the largest of the "peeps" in North America, and one of the most colorful. It makes one of the longest yearly migrations of any bird, traveling 15,000 km (9,300 mi) from its Arctic breeding grounds to Tierra del Fuego in southern South America.
Usually quiet away from breeding grounds, but may make a subdued, somewhat nasal whine that increases in strength and scale for about one second. Also a two-part "knuup-knuup" in flight. Display song is moaning, flutelike repeated "poorr-mee."
All About Birds blog, First-Ever World Shorebirds Day Highlights Need for Conservation, September 5, 2014.