Fair Isle wren

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Fair Isle wren
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Chordata
Class: Aves
Order: Passeriformes
Family: Troglodytidae
Genus: Troglodytes
Species:
Subspecies:
T. t. fridariensis
Trinomial name
Troglodytes troglodytes fridariensis
Williamson, 1951

The Fair Isle wren (Troglodytes troglodytes fridariensis) is a small passerine bird in the wren family. It is a subspecies of the Eurasian wren endemic to Fair Isle, Shetland, Scotland, an island about halfway between mainland Shetland and Orkney. It was first described by the British ornithologist Kenneth Williamson in 1951. [1]

Contents

Description

The Fair Isle wren is darker and larger than the mainland form of the winter wren, though not as dark as another insular subspecies, the Shetland wren, T. t. zetlandicus. [2]

Distribution and habitat

This wren is endemic to Fair Isle, an island about halfway between mainland Shetland and Orkney. The St Kilda wren on the island of Hirta is often found nesting in crevices on the cliffs, and in association with puffin colonies, but that is not the case with the Fair Isle wren, where the low red sandstone cliffs are rather bare, with friable rock and earth slides, and small patches of tufted vegetation. The main breeding habitat of Fair Isle wrens is boulder beaches at the tip of long inlets. The boulders provide the shelter lacking on the cliffs, but even so, the windswept south-west of the island hosts few wrens. No breeding seems to occur in the crofting area, although the birds may feed here later in the year when the young are independent. [3]

Ecology

The Fair Isle wren spends much time feeding on the foreshore among the dead seaweed cast up by the tide. Their diet includes sandhoppers and other crustaceans, and the larvae of flies. [3]

Status

Fair Isle is a small island, 7.68 km2 (2.97 sq mi) in area, and the population of the wren is tiny, varying from ten to fifty pairs, breeding mainly on boulder beaches. [2]

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Fair Isle Island in Shetland, Scotland

Fair Isle is an island in Shetland, in northern Scotland. It lies about halfway between mainland Shetland and Orkney. It is known for its bird observatory and a traditional style of knitting. The island has been owned by the National Trust for Scotland since 1954.

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St Kilda is an isolated archipelago situated 64 kilometres (40 mi) west-northwest of North Uist in the North Atlantic Ocean. It contains the westernmost islands of the Outer Hebrides of Scotland. The largest island is Hirta, whose sea cliffs are the highest in the United Kingdom; three other islands were also used for grazing and seabird hunting. The islands are administratively a part of the Comhairle nan Eilean Siar local authority area.

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St Kilda wren Subspecies of bird

The St Kilda wren is a small passerine bird in the wren family. It is a distinctive subspecies of the Eurasian wren endemic to the islands of the isolated St Kilda archipelago, in the Atlantic Ocean 64 kilometres (40 mi) west of the Outer Hebrides, Scotland.

The Shetland wren is a small passerine bird in the wren family. It is a subspecies of the Eurasian wren endemic to the Shetland archipelago of Scotland, with the exception of Fair Isle which has its own endemic subspecies, the Fair Isle wren. The Shetland wren is distinguished by its darker and more rufous-brown colouring from the mainland form, with a heavily barred underside, the barring extending from belly to breast. The bill is stouter and longer and it has stronger legs.

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References

  1. Williamson, Kenneth. (1951). The wrens of Fair Isle. Ibis93(4): 599-601.
  2. 1 2 "Nature in Shetland". Archived from the original on 26 July 2011. Retrieved 4 December 2008.
  3. 1 2 Williamson, Kenneth (1958). "Population and breeding environment of the St Kilda and Fair Isle Wrens" (PDF). British Birds. LI (10).