Curlew Sandpiper, Calidris ferruginea, is a species of wader found in unvegetated or sparsely vegetated land ecosystems. It breeds in a narrow latitudinal range in the central Siberian Arctic. This species is a full migrant, moving long distances by well-travelled routes. It shows a preference for open tundra with marshy, boggy depressions and pools from melting permafrost and snow (European Red List 2015).

Calidris ferruginea has a winter population size of 1000-1800 individuals in the EU27. The winter population trend in the EU27 is Increasing in the short term and Fluctuating in the long term.

The EU population status of Calidris ferruginea was assessed as Threatened, as the species meets one or more of the IUCN Red List criteria for threatened at the EU27 scale.