Arctic Warbler
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Order: Passeriformes
Family: Phylloscopidae

[Photo] Arctic Warbler (Phylloscopus borealis), Pierce Reservoir, Singapore. Malay: Cekup Daun Artik. Indonesian: Cikrak kutub, Perenjak kutub. Source: Flickr (www.flickr.com/photos/lipkee/1711707847/). Date: February 12, 2006. Author: Lip Kee (www.flickr.com/photos/lipkee/).

The Arctic Warbler, Phylloscopus borealis, is a widespread leaf warbler in birch or mixed birch forest near water throughout its breeding range in Fennoscandia and northern Asia. It has established a foothold in North America, breeding in Alaska.

The nest is on the ground in a low shrub. Like most Old World warblers, this small passerine is insectivorous.

This warbler is strongly migratory; the entire population winters in southeast Asia. It therefore has one of the longest migrations of any Old World insectivorous bird.

This is a typical leaf warbler in appearance, greyish-green above and off-white below. Its single wing bar distinguishes it from most similar species except the Greenish Warbler, Phylloscopus trochiloides. It is larger than that species and has a heavier, dagger-like bill, with a dark tip to the lower mandible. Its song is a fast trill.

This species occurs as an autumn vagrant in western Europe and is annual in Great Britain.

http://en.wikipedia.org/wiki/Arctic_Warbler

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