Ruddy Turnstone, Arenaria interpres, is a species of wader found in unvegetated or sparsely vegetated land, river and lake and coastal ecosystems. It breeds in coastal areas of northern Europe. The species breeds near the coast or up to several kilometres inland in the high Arctic, nesting on coastal plains, marshes and tundra and showing a preference for mosaics of bare rock, clay or shingle and vegetation near water or in areas that remain damp until late summer. Outside of the breeding season the species is mainly coastal, although on migration it may occur inland along dykes or on lake shores (European Red List 2015).

Arenaria interpres has a breeding population size of 2900-4600 pairs and a breeding range size of 90400 square kilometres in the EU27. The breeding population trend in the EU27 is Decreasing in the short term and Decreasing in the long term. Arenaria interpres has a winter population size of 90900-94200 individuals in the EU27. The winter population trend in the EU27 is Increasing in the short term and Increasing in the long term.

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