Arctic Warbler

Overview

The Arctic warbler, Phylloscopus borealis, is a widespread leaf warbler that inhabits birch or mixed birch forests near water in Fennoscandia, the northern Palearctic, and parts of Alaska. It is a strongly migratory species, with the entire population wintering in southeast Asia, resulting in one of the longest migrations of any Old World insectivorous bird.

Identification

• Greyish-green upperparts and off-white underparts, with a single wing bar.
• Larger than the greenish warbler, featuring a heavier, dagger-like bill with a dark tip on the lower mandible.
• Song consists of a fast trill.

Habitat

Found in birch or mixed birch forests near water throughout its breeding range in Fennoscandia, the northern Palearctic, and Alaska. This species has established a foothold in North America and is classified as Least Concern by the IUCN Red List.

Diet

Like most Old World warblers, this small passerine is insectivorous, though specific foraging methods are not detailed.

Did you know?

The genus name Phylloscopus derives from the Ancient Greek words for 'leaf' and 'seeker', while the specific name borealis is Latin for 'northern'.