Calidris ferruginea is a species of bird commonly known as the Curlew Sandpiper. This medium-sized wader is a member of the sandpiper family and has a distinctive long, down-curved beak. The Curlew Sandpiper is commonly found along the coasts of Europe, Asia, and Australia during the winter months. Synonyms for Calidris ferruginea include Rusty Sandpiper, Ferruginous Sandpiper, and Red-breasted Sandpiper. These synonyms reflect the bird's characteristic rust-colored plumage and rusty-red breast. The Curlew Sandpiper is a fascinating avian species that is an important part of many coastal ecosystems, and studying its behavior and biology is essential to conservation efforts.