Paruline à flancs marron

Setophaga pensylvanica

Les oiseaux nicheurs montrent une calotte jaune, un triangle noir sous l'œil, un dos strié et des flancs brun-roux. Il apparaît remarquablement différent en automne avec un vert citron distinctif dessus et gris dessous avec un cercle oculaire blanc marqué. Il se reproduit principalement dans les forêts secondaires, en particulier les zones avec de grands arbustes et de jeunes arbres. Il se porte bien dans les habitats perturbés, notamment les couloirs de lignes électriques et les zones déboisées. Il fourrage des insectes. Il hiverne en Amérique centrale.

Identification

This species is a moderately-sized New World warbler. Despite having very different plumage, it is thought to be closely related to the widespread yellow warbler. In total, this species measures from 10 to 14 cm (3.9 to 5.5 in) in length and spans 16 to 21 cm (6.3 to 8.3 in) across the wings. Body weight ranges from 8 to 13.1 g (0.28 to 0.46 oz). Among standard measurements, the wing chord is 5.7 to 6.8 cm (2.2 to 2.7 in), the tail is 4.2 to 5.8 cm (1.7 to 2.3 in), the bill is 0.9 to 1 cm (0.35 to 0.39 in) and the tarsus is 1.7 to 1.9 cm (0.67 to 0.75 in).<p>In the summer, male chestnut-sided warblers are unmistakable in appearance. They display dark-streaked gray backs, white faces, black eyestripes and yellow crowns. Their underparts are white, with chestnut flanks, and they also have two white wing bars. The adult females resemble washed-out versions of the summer male, and in particular, the females lack the strong head pattern, and also have little to no chestnut coloring on their flanks.<p>Non-breeding birds of both sexes have bright yellow-green crowns, white eye-rings on a grey face, and unstreaked underparts. They also have unstreaked pale grey breasts. Their wing bars are always present in their plumages. Their lack of streaking and yellowish backs help to distinguish this species from the larger blackpoll warbler in the fall.

Taxonomie

Nom scientifique
Setophaga pensylvanica
Autorité
(Linnaeus, 1766)
Ordre
Passériformes
Famille
Parulidés
Genre
Setophaga

Répartition et habitat

Aire de reproduction
NA : sc, se Canada to nc, ne, e USA
Aire hors reproduction
Guatemala to n SA
Migration
Complete migrants

Conservation

Tendance de la population
declining

Photos

Distribution

Chants d'Oiseaux

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