Arctic warbler

Phylloscopus borealis

SUBFAMILY

Sylviinae

TAXONOMY

Phyllopneuste borealis Blasius, 1858. OTHER COMMON NAMES

French: Pouillot boréal; German: Wanderlaubsanger; Spanish: Mosquitero Boreal.

PHYSICAL CHARACTERISTICS

4.1-5.1 in (10.5-13 cm); 0.3-0.5 oz (8-15 g). Medium-sized warbler, olive-green above, yellowish-white below, with a yellow wash in some plumages. Thin, clean whitish eye line; long wings with two whitish wing bars.

DISTRIBUTION

Breeds in boreal and subalpine zones from Scandinavia throughout Asia to Japan and Western Alaska. Winters in Southeast Asia, Wallacea.

HABITAT

Coniferous, deciduous, and mixed forest in taiga zone. Winters in open woodlands, rainforest, forest edge, gardens, and mangroves.

BEHAVIOR

Arboreal and active, with quick flight and habit of wing- and tail-flicking. Usually solitary or in pairs or small family groups. Territorial; male often defends with song and wing-rattling displays.

FEEDING ECOLOGY AND DIET

Forages in foliage for insects and larvae, usually high, but occasionally close to the ground.

Phylloscopus collybita

I Resident | Breeding H Nonbreeding

Phylloscopus collybita

I Resident | Breeding H Nonbreeding

REPRODUCTIVE BIOLOGY

Monogamous, occasionally polygynous. Courtship involves song, wing-rattling and wing-flapping displays. Nest is built by the female; dome of dry grass and other plant materials with a side entrance on the ground in thick vegetation. Incubation of 5-7 eggs for 11-13 days by female; fledging takes 13-14 days, young fed by both parents, brooded by female; young independent after two weeks.

CONSERVATION STATUS

Not threatened.

SIGNIFICANCE TO HUMANS None known. ♦

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