Isabelline wheatear (Oenanthe isabellina)

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Isabelline wheatear with prey, in flight
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Isabelline wheatear fact file

Isabelline wheatear description

KingdomAnimalia
PhylumChordata
ClassAves
OrderPasseriformes
FamilyMuscicapidae
GenusOenanthe (1)

The largest of the Oenanthe species, the isabelline wheatear is a migratory, insectivorous bird. Its similarity to the northern wheatear (Oenanthe oenanthe) can make it difficult to identify but it does have some unique characteristics. It has a long, strong and slightly hooked bill, a relatively short tail, and a long body usually held noticeably upright (2). Its long legs and claws and a wide footspan enable the isabelline wheatear to run along the ground at notable speed (4). The English name of this species refers to the colouration, isabelline, which can be described as pale grey-yellow or pale fawn. It is the palest of the Oenanthe species, with little contrast between its upper and under parts. Female isabelline wheatears are generally smaller and slightly duller than males (2).

French
Traquet isabelle.
Size
Length: 16.5 cm (2)
Wingspan: 27 - 31 cm (2)
Weight
31 g (3)
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Isabelline wheatear biology

The diet of this species consists primarily of small invertebrates, such as ants and beetles, which it digs for in the soil. Its large, strong bill allows the isabelline wheatear to hammer prey using its bill and then to swallow it whole. It either hovers to locate its prey or forages on the ground, making quick dashes after prey; it has even been recorded leaping for prey such as grasshoppers. The diet of young isabelline wheatears is less varied than that of the adult birds, and consists of a greater proportion of caterpillars (2).

Normally solitary and territorial in winter, the isabelline wheatear forms pairs towards the end of winter and during migration, when it may also associate with other Oenanthe species. The breeding season typically begins at the end of March (2), though can be earlier in the southern parts of its range (5), when the isabelline wheatear nests in the burrow of a rodent or in a natural hole. It is primarily a monogamous species, with both the male and female sharing responsibility for feeding the young. The young are fed for 12 to 14 days after leaving the nest and are then forced to the edge of their parents’ territory. A second brood is usually started before the first is completely independent (2).

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Isabelline wheatear range

The isabelline wheatear has a large global range, breeding in the western Palearctic, from southern Russia to west and central Asia.  It has a discontinuous wintering range across Africa, principally north of the equator, and in central India and Pakistan (3) (5).

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Isabelline wheatear habitat

Generally a ground-dwelling bird, the isabelline wheatear prefers the warm, arid climates of open plains and plateaus up to 3,500 metres above sea level. It also occurs in forest steppe (a habitat of grassland interspersed with forest or woodland) in Russia, although it avoids the forests. It favours level or gently sloping terrain that is open with a few isolated shrubs or rocks. Due to its habit of nesting in burrows, clay is the ideal ground surface, and it tends to dislike loose sand or surface gravel (2).

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Isabelline wheatear status

Classified as Least Concern (LC) on the IUCN Red List (1).

IUCN Red List species status – Least Concern

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Isabelline wheatear threats

The isabelline wheatear is not currently considered to be threatened with extinction (1).

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Isabelline wheatear conservation

Being of Least Concern, there are no specific conservation projects targeted at this species. However, some efforts are in place to ensure the maintenance of habitats which may, in turn, help to conserve it. An example is ‘The Important Bird Area (IBA) Programme’ of Birdlife International.  This programme, which began in 1985, aims to identify and protect a network of critical sites of the world’s birds (6).

Environment Agency - Abu Dhabi is a principal sponsor of ARKive. EAD is working to protect and conserve the environment as well as promoting sustainable development in the Emirate of Abu Dhabi.
View information on this species at the UNEP World Conservation Monitoring Centre.
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Find out more

To learn more about BirdLife International’s Important Bird Area Programme visit:

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Authentication

Authenticated (01/09/10) by Geoff Welch, Chairman of OSME Council,
http://www.osme.org

This species information was authored as part of the ARKive and Universities Scheme.
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Glossary

Insectivorous
Feeding primarily on insects.
Invertebrates
Animals with no backbone, such as insects, crustaceans, worms, molluscs, spiders, cnidarians (jellyfish, corals, sea anemones), echinoderms, and others.
Monogamous
Having only one mate during a breeding season, or throughout the breeding life of a pair.
Territorial
Describes an animal, a pair of animals or a colony that occupies and defends an area.
Vertebrates
Animals with a backbone, including mammals, birds, reptiles, amphibians and fish.
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References

  1. IUCN Red List (March, 2010)
    http://www.iucnredlist.org
  2. Cramp, S. (1988) Handbook of the Birds of Europe, the Middle East and North Africa. Oxford University Press, Oxford.
  3. Robinson, R.A. (2005) BirdFacts: Profiles of Birds Occurring in Britain and Ireland. BTO Research Report 407, BTO, Thetford. Available at:
    http://blx1.bto.org/birdfacts/results/bob11440.htm
  4. Kaboli, M., Aliabadian, M., Guillaumet, A., Roselaar, C. and Prodon, R. (2007) Ecomorphology of the wheatears (genus Oenanthe). Ibis, 149: 792-805.
  5. Welch, G. (2010) Pers. comm.
  6. BirdLife International: Important Bird Areas (October, 2009)
    http://www.birdlife.org/action/science/sites
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Image credit

Isabelline wheatear with prey, in flight  
Isabelline wheatear with prey, in flight

© Kerstin Hinze / Biosphoto

Biosphoto
16 rue Velouterie
Avignon
84000
France
Tel: +33 (490) 162 042
Fax: +33 (663) 208 434
http://www.biosphoto.com/

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