thumb|Northern wheatear juvenile

The northern wheatear or wheatear (Oenanthe oenanthe) is a small passerine bird in the Old World flycatcher family. It is the most widespread member of the wheatear genus Oenanthe in Europe and North and Central Asia. The northern wheatear is a migratory insectivorous species breeding in open stony country in Europe and east across the Palearctic with footholds in northeastern Canada and Greenland as well as in northwestern Canada and Alaska. It nests in rock crevices and rabbit burrows. All birds spend most of their winter in Africa.

Taxonomy and systematics

The northern wheatear belongs to a distinctive group of Old World flycatchers, known as chats, that were formerly thought to be thrushes. Genetic analysis showed that they were in fact a type of flycatcher (Muscicapidae), with the resemblance to thrushes being the result of convergent evolution. The northern wheatear was first formally described by the Swedish naturalist Carl Linnaeus in 1758 in the 10th edition of his Systema Naturae as Motacilla oenanthe. The species is now placed in the genus Oenanthe that was introduced by the French ornithologist Louis Pierre Vieillot in 1816. The generic name, Oenanthe, is also the name of a plant genus, the water dropworts, and is derived from the Greek ainos "wine" and anthos "flower", from the wine-like scent of the flowers. In the case of the wheatear, it refers to the birds' return to Greece in the spring at the time that the grapevines blossom.

Its English name has nothing to do with wheat or with ear, but is an altered (perhaps bowdlerised) form of white-arse, which refers to its prominent white rump.

The four generally accepted subspecies of the Northern Wheatear with their breeding range are as follows:

  • O. o. leucorhoa <small>(Gmelin, JF, 1789)</small> – northeast Canada, Greenland and Iceland (the 'Greenland wheatear')
  • O. o. oenanthe <small>(Linnaeus, 1758)</small> – north and central Europe through north Asia to east Siberia and northwest North America
  • O. o. libanotica <small>(Hemprich & Ehrenberg, 1833)</small> – southern Europe through the Middle East and southwest Asia to Mongolia and northwest China
  • O. o. seebohmi <small>(Dixon, 1882)</small> – northwest Africa

O.o. seebohmi is regarded as a distinct species by some authorities such as the International Ornithological Committee, Seebohm's or the Atlas wheatear.

Description

thumb|Eggs, Collection [[Museum Wiesbaden]]

The northern wheatear is larger than the European robin at in length. The northern wheatear also has a wingspan of 26–32&nbsp;cm and weighs 17–30 g.

Both sexes have a white rump and tail, with a black inverted T-pattern at the end of the tail.

The plumage of the summer male has grey upperparts, buff throat and black wings and face mask. In autumn it resembles the female apart from the black wings. The female is pale brown above and buff below with darker brown wings. The male has a whistling, crackly song. Its call is a typical chat chack noise, and the flight call is the same.

Behaviour and ecology

Migration

The northern wheatear makes one of the longest journeys of any small bird, crossing ocean, ice, and desert. It migrates from Sub-Saharan Africa in the spring over a vast area of the Northern Hemisphere that includes northern and central Asia, Europe, Greenland, Alaska, and parts of Canada.

Birds of the large, bright Greenland race, leucorhoa, make one of the longest transoceanic crossings of any passerine. In spring most migrate along a route (commonly used by waders and waterfowl) from Africa via continental Europe, the British Isles, and Iceland to Greenland. However, autumn sightings from ships suggest that some birds cross the North Atlantic directly from Canada and Greenland to southwest Europe, a distance of up to . Birds breeding in eastern Canada are thought to fly from Baffin Island and Newfoundland via Greenland, Ireland, and Portugal to the Azores, crossing of the North Atlantic) before flying onwards to Africa. Other populations from western Canada and Alaska migrate by flying over much of Eurasia to Africa.

<blockquote>"The Alaskan birds travelled almost 15,000km (9,000 miles) each way - crossing Siberia and the Arabian Desert, and travelling, on average, 290km per day. "This is the longest recorded migration for a songbird as far as we know," said Dr Schmaljohann.

References

Sources

  • Northern Wheatear videos, photos & sounds on the Internet Bird Collection
  • Ageing and sexing (PDF; 4.3 MB) by Javier Blasco-Zumeta & Gerd-Michael Heinze
  • Xeno-canto: audio recordings of the Northern Wheatear