Pied wagtail  (Motacilla alba )

Pied wagtail

Facts

Also known as:white wagtail
Kingdom Animalia
Phylum Chordata
Class Aves
Order Passeriformes
Family Motacillidae
Genus Motacilla (1)
Size Length: 16.5-19 cm (2)
Wingspan: 25-30 cm (3)
Weight 17-25 g (3)
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Status

Included in the Birds of Conservation Concern Green List (low conservation concern) (4).

Description

The pied wagtail is instantly recognisable thanks to its distinctive black and white plumage, loud tsli-vitt call, and characteristic habit of constantly bobbing the tail, hence the common name ‘wagtail’ (5) (2). The pied wagtail (Motacilla alba yarrellii) is a subspecies that occurs in Britain. It differs from subspecies alba, which occurs on the continent and is known as the white wagtail, in that during the breeding season, males develop black upperparts and females have sooty dark grey upperparts (2).

Range

Common and widespread throughout most of Britain, but absent from high ground in winter (5). It is most common in the south of Britain, where birds tend to be sedentary. Northern pied wagtails tend to move southwards for the winter, augmenting the southern populations or travelling to western parts of France, Spain and Portugal (5). The paler continental subspecies, the white wagtail sometimes visits Britain as a passage migrant and occasionally breeds in Shetland (6).

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Habitat

This bird tends to prefer habitats close to water, such as river banks and lake edges. However it can also be seen in farmland, moorland, parks and gardens (3), as well as around sewage farms, reservoirs and in towns (5).

Biology

Pied wagtails are often seen running across lawns, car parks and other flat areas in pursuit of insects (6). In winter they may also feed on seeds and often gather on rubbish dumps to feed (5). These birds flock together to roost at warm sites such as reed beds and sewage farms. Many birds also feed in flocks in the winter, although some males defend territories (5).

In summer, pied wagtails defend breeding territories (6); the nest is built beneath roof tiles, in walls, amongst ivy, or beneath stones (2) and five or six eggs are produced. These are incubated for 11-16 days and the young will have fledged by 16 days of age (3).

Threats

This species is not threatened at present (4).

Conservation

Conservation action has not been targeted at this common species.

Further Information

For more on British birds see the RSPB website:
http://www.rspb.org.uk

Authentication

This information is awaiting authentication by a species expert, and will be updated as soon as possible. If you are able to help please contact:
arkive@wildscreen.org.uk

Glossary

Subspecies: a population usually restricted to a geographical area that differs from other populations of the same species, but not to the extent of being classified as a separate species.

References

  1. National Biodiversity Network Species Dictionary (January2004):
    http://www.nhm.ac.uk/nbn
  2. Mullarney, K., Svensson, L., Zetterström, D. & Grant, P.J. (1999) Collins Bird Guide. HarperCollins Publishers Ltd, London.
  3. RSPB A-Z of Birds: Pied wagtail (February 2004):
    http://www.rspb.org.uk/birds/guide/p/piedwagtail/index.asp
  4. British Trust for Ornithology/ JNCC- breeding birds in the wider countryside: pied wagtail (February 2004):
    http://www.bto.org/birdtrends
  5. Lack. P. (1986) The Atlas of wintering birds in Britain and Ireland. T & A D Poyser Ltd, London.
  6. Holden, P. & Sharrock, J.T.R. (2002) The RSPB Guide to British Birds. Pan Macmillan, London.