The Curlew Sandpiper (Calidris ferruginea) is a medium-sized wader that breeds in the Arctic tundra and migrates to coastal wetlands, estuaries, and tidal mudflats across the globe during the non-breeding season. It is easily recognized by its slightly down-curved bill, long legs, and reddish-brown breeding plumage, which turns pale gray in winter. A highly migratory species, it undertakes remarkable long-distance journeys between breeding and wintering grounds. The Curlew Sandpiper feeds on small invertebrates by probing soft mud or sand and is often seen in mixed flocks with other shorebirds. Its populations are declining due to habitat loss, making conservation efforts essential for this elegant traveler.