Eurasian curlew

Eurasian curlew. The Eurasian curlew (Numenius arquata) is a large wader in the family Scolopacidae, renowned for its long, downcurved bill and evocative, bubbling call. It breeds across the grasslands and moorlands of northern Europe and Asia, migrating to coastal estuaries, mudflats, and wetlands in winter. This species is the largest wader found in Europe and is considered a flagship species for conservation due to significant population declines across its range.

Description and taxonomy

The species was formally described by Carl Linnaeus in his landmark 1758 work Systema Naturae. It is one of eight species within the genus Numenius, which are collectively known as curlews and characterized by their distinctive long, decurved bills. The plumage is predominantly streaked brown and grey, providing excellent camouflage in its breeding habitats, with a distinctive white back and rump visible in flight. The bill, which is longer in females, is a highly specialized tool for probing deep into soft substrates for invertebrate prey. The Eurasian curlew is most similar in appearance to the Far Eastern curlew and the long-billed curlew, though it is distinguished by its range and specific morphological details.

Distribution and habitat

Its breeding range extends from the British Isles and Iberian Peninsula eastwards across temperate and subarctic regions of Europe and Asia, reaching central Siberia. Key breeding landscapes include upland moors, damp grasslands, and forest clearings in regions like the North York Moors and the Białowieża Forest. During the non-breeding season, populations migrate to coastal areas, with major wintering sites including the Wadden Sea, the Banc d'Arguin, and estuaries such as the Severn Estuary and the Wash. It also winters inland in parts of the Mediterranean Basin, South Asia, and Japan, frequenting tidal mudflats, saltmarshes, and freshwater wetlands.

Behaviour and ecology

The diet consists primarily of invertebrates, including polychaete worms, crustaceans, and insects, which it extracts from mud or soil with its sensitive bill tip. On breeding grounds, it also consumes earthworms and larvae of beetles like Tipulidae. Its haunting, melancholic call, often transcribed as "cur-lee," is a defining sound of its habitat and is used in territorial and mating displays. Nests are simple scrapes on the ground in open country. The species faces predation from mammals like the red fox and birds such as the common raven, while its eggs and chicks are particularly vulnerable. It often forms large, loose flocks outside the breeding season, mixing with other waders like black-tailed godwit and bar-tailed godwit on wintering grounds.

Conservation status

The Eurasian curlew is classified as Near Threatened on the IUCN Red List and is listed under the Agreement on the Conservation of African-Eurasian Migratory Waterbirds. Populations have undergone severe declines, particularly in western Europe, due to agricultural intensification, afforestation, and predation pressure on breeding sites. Conservation initiatives are coordinated by organizations like the Royal Society for the Protection of Birds and BirdLife International, focusing on habitat management, predator control, and research programs such as the Curlew Recovery Partnership. It is also a protected species under the Wildlife and Countryside Act 1981 in the United Kingdom.

Cultural significance

The bird's distinctive call has made it a potent symbol in literature and folklore, often associated with melancholy and the wild, untamed landscapes of the British and Irish countryside. It is notably referenced in W. B. Yeats's poem "The Curlew" and in the works of Dylan Thomas. The name "curlew" itself is onomatopoeic, derived from its call. In some regions, its arrival and departure were traditionally seen as markers of the changing seasons. The species' plight has also elevated it to an icon for wetland and grassland conservation campaigns across its migratory range.

Category:Waders Category:Birds of Europe Category:Birds of Asia Category:IUCN Red List near threatened species Category:Birds described by Carl Linnaeus