The Eurasian stone-curlew, Eurasian thick-knee, or simply stone-curlew (''Burhinus oedicnemus'') is a northern species of the Burhinidae ( stone-curlew)

bird Birds are a group of warm-blooded vertebrates constituting the class (biology), class Aves (), characterised by feathers, toothless beaked jaws, the Oviparity, laying of Eggshell, hard-shelled eggs, a high Metabolism, metabolic rate, a fou ...

family.

Taxonomy

The Eurasian stone-curlew was formally described by the Swedish naturalist

Carl Linnaeus Carl Linnaeus (23 May 1707 – 10 January 1778), also known after ennoblement in 1761 as Carl von Linné,#Blunt, Blunt (2004), p. 171. was a Swedish biologist and physician who formalised binomial nomenclature, the modern system of naming o ...

in 1758 in the tenth edition of his ''

Systema Naturae ' (originally in Latin written ' with the Orthographic ligature, ligature æ) is one of the major works of the Sweden, Swedish botanist, zoologist and physician Carl Linnaeus (1707–1778) and introduced the Linnaean taxonomy. Although the syste ...

'' under the

binomial name In taxonomy, binomial nomenclature ("two-term naming system"), also called binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin grammatical forms, altho ...

''Charadrius oedicnemus''. He specified the locality as England. The name ''Oedicnemus'' had been used earlier by the French naturalist Pierre Belon in 1655. The species is now placed in the genus ''

Burhinus ''Burhinus'' is a genus of birds in the family Burhinidae. This family also contains the genus ''Esacus''.del Hoyo J, Elliott A, Sargatal J (1996) ''Handbook of the Birds of the World'', ''vol 3.'' Lynx, Barcelona The genus name ''Burhinus'' com ...

'' that was introduced by the German zoologist

Johann Karl Wilhelm Illiger Johann Karl Wilhelm Illiger (19 November 1775 – 10 May 1813) was a German entomologist and zoologist. He founded the entomological periodical ''Magazin für Insektenkunde.'' The plant genus '' Illigera'' is named in his honour. Biography Illi ...

in 1811. The genus name combines the

Greek Greek may refer to: Anything of, from, or related to Greece, a country in Southern Europe: *Greeks, an ethnic group *Greek language, a branch of the Indo-European language family **Proto-Greek language, the assumed last common ancestor of all kno ...

' meaning "ox" with ' meaning "nose". The

species A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...

name ''oedicnemus'' combines the Greek meaning "to swell", and meaning "shin" or "leg", referring to the bird's prominent

tibiotarsal joint In the anatomy of humans and many other mammals, the tibiotarsal joint is the joint between the tibia and the tarsus (skeleton), tarsus. In bird, avian anatomy, it is the equivalent of the ankle. In equine veterinary science, Synovial joint, syno ...

s, which also give it the common name of "thick-knee". This is an abbreviated form of

Thomas Pennant Thomas Pennant (16 December 1798) was a Welsh natural history, naturalist, traveller, writer and antiquarian. He was born and lived his whole life at his family estate, Downing Hall, near Whitford, Flintshire, in Wales. As a naturalist he had ...

's 1776 coinage "thick-kneed bustard". The name "stone curlew" was recorded by

Francis Willughby Francis Willughby (sometimes spelt Willoughby, ) Fellow of the Royal Society, FRS (22 November 1635 – 3 July 1672) was an English ornithology, ornithologist, ichthyology, ichthyologist and mathematician, and an early student of linguistics an ...

in 1678 as a "''third sort of

Godwit Godwits are a group of four large, long-billed, long-legged and strongly bird migration, migratory waders of the bird genus ''Limosa''. Their long bills allow them to probe deeply in the sand for aquatic worms and mollusca, molluscs. In their ...

, which in

Cornwall Cornwall (; or ) is a Ceremonial counties of England, ceremonial county in South West England. It is also one of the Celtic nations and the homeland of the Cornish people. The county is bordered by the Atlantic Ocean to the north and west, ...

they call the Stone-Curlew, differing from the precedent in that it hath a much shorter and slenderer Bill than either of them''". It derives from the bird's nocturnal calls sounding like the only distantly related

Eurasian curlew The Eurasian curlew or common curlew (''Numenius arquata'') is a very large wader in the family Scolopacidae. It is one of the most widespread of the curlews, breeding across temperate Europe and Asia. In Europe, this species is often referred ...

''Numenius arquata'' and its preference for barren stony

heath A heath () is a shrubland habitat found mainly on free-draining infertile, acidic soils and is characterised by open, low-growing woody vegetation. Moorland is generally related to high-ground heaths with—especially in Great Britain—a coole ...

s. Five

subspecies In Taxonomy (biology), biological classification, subspecies (: subspecies) is a rank below species, used for populations that live in different areas and vary in size, shape, or other physical characteristics (Morphology (biology), morpholog ...

are recognised: * ''B. o. oedicnemus'' (

Linnaeus Carl Linnaeus (23 May 1707 – 10 January 1778), also known after ennoblement in 1761 as Carl von Linné,#Blunt, Blunt (2004), p. 171. was a Swedish biologist and physician who formalised binomial nomenclature, the modern system of naming o ...

, 1758) – west, south Europe to the Balkans, Ukraine and Caucasus * ''B. o. distinctus'' ( Bannerman, 1914) – west Canary Islands * ''B. o. insularum'' (Sassi, 1908) – east Canary Islands * ''B. o. saharae'' ( Reichenow, 1894) – north Africa and the Mediterranean islands to Iraq and Iran * ''B. o. harterti'' Vaurie, 1963 – west Kazakhstan to Pakistan and northwest India The Indian stone-curlew ''Burhinus indicus'' was previously considered as a subspecies of the Eurasian stone-curlew.

Description

The Eurasian stone-curlew is a fairly large wader, though mid-sized by the standards of its

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

. Length ranges from , wingspan from and weight from . with a strong yellow and black beak, large yellow eyes (which give it a " reptilian", or "goggle-eyed" appearance), and cryptic plumage. The bird is striking in flight, with black and white wing markings.

Distribution and habitat

The Eurasian stone-curlew occurs throughout

Europe Europe is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south, and Asia to the east ...

, north

Africa Africa is the world's second-largest and second-most populous continent after Asia. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 20% of Earth's land area and 6% of its total surfac ...

and southwestern Asia. It is a summer migrant in the more temperate European and Asian parts of its range, wintering in

. Despite being classed as a wader, this species prefers dry open habitats with some bare ground.

Behaviour and ecology

The Eurasian stone-curlew is largely

nocturnal Nocturnality is a ethology, behavior in some non-human animals characterized by being active during the night and sleeping during the day. The common adjective is "nocturnal", versus diurnality, diurnal meaning the opposite. Nocturnal creatur ...

, particularly when singing its loud wailing songs, which are reminiscent of that of

curlew The curlews () are a group of nine species of birds in the genus ''Numenius'', characterised by their long, slender, downcurved bills and mottled brown plumage. The English name is imitative of the Eurasian curlew's call, but may have been infl ...

s. Food consists of

insect Insects (from Latin ') are Hexapoda, hexapod invertebrates of the class (biology), class Insecta. They are the largest group within the arthropod phylum. Insects have a chitinous exoskeleton, a three-part body (Insect morphology#Head, head, ...

s and other small

invertebrates Invertebrates are animals that neither develop nor retain a vertebral column (commonly known as a ''spine'' or ''backbone''), which evolved from the notochord. It is a paraphyletic grouping including all animals excluding the chordate subphylum ...

, and occasionally small

reptile Reptiles, as commonly defined, are a group of tetrapods with an ectothermic metabolism and Amniotic egg, amniotic development. Living traditional reptiles comprise four Order (biology), orders: Testudines, Crocodilia, Squamata, and Rhynchocepha ...

frog A frog is any member of a diverse and largely semiaquatic group of short-bodied, tailless amphibian vertebrates composing the order (biology), order Anura (coming from the Ancient Greek , literally 'without tail'). Frog species with rough ski ...

s and

rodent Rodents (from Latin , 'to gnaw') are mammals of the Order (biology), order Rodentia ( ), which are characterized by a single pair of continuously growing incisors in each of the upper and Mandible, lower jaws. About 40% of all mammal specie ...

Breeding

Eurasian stone-curlews probably first breed when they are three years old. The eggs are laid at two day intervals in a scrape on open ground. The clutch normally consists of 2 eggs which are on average . The eggs are pale buff and are variably spotted, streaked or blotched with brown or purple grey. Both sexes incubate the eggs beginning after the last egg is laid. The eggs hatch after 24–26 days. The

precocial Precocial species in birds and mammals are those in which the young are relatively mature and mobile from the moment of birth or hatching. They are normally nidifugous, meaning that they leave the nest shortly after birth or hatching. Altricial ...

young leave the nest soon after hatching and are then cared for by both parents for 36–42 days. Normally only a single brood is raised each year but a replacement clutch is laid after the loss of eggs or the loss of small young. The maximum recorded age recorded from ring-recovery data within the British Isles is 22 years and 4 months for a bird ringed as a nestling in

Suffolk Suffolk ( ) is a ceremonial county in the East of England and East Anglia. It is bordered by Norfolk to the north, the North Sea to the east, Essex to the south, and Cambridgeshire to the west. Ipswich is the largest settlement and the county ...

in 1990 and caught again in Suffolk in 2012.

Status

Although the

International Union for Conservation of Nature The International Union for Conservation of Nature (IUCN) is an international organization working in the field of nature conservation and sustainable use of natural resources. Founded in 1948, IUCN has become the global authority on the stat ...

currently categorizes the Eurasian stone-curlew as a

least-concern species A least-concern species is a species that has been evaluated and categorized by the International Union for Conservation of Nature (IUCN) as not being a focus of wildlife conservation because the specific species is still plentiful in the wil ...

, some populations have shown declines due to agricultural intensification. For example, a study conducted in France between 1998 and 2016 observed a 26% population decline over a 14-year period.

References

Sources

* *

External links

*
Ageing and sexing (PDF; 4.7 MB) by Javier Blasco-Zumeta & Gerd-Michael Heinze
* * * * * {{Authority control Eurasian stone curlew Birds of Eurasia Birds of North Africa Birds of the Canary Islands Eurasian stone curlew Eurasian stone curlew