Mosquitero de Hartert Phylloscopus goodsoni

Bright yellowish leaf warbler of forest canopy. Like Blyth’s and Claudia’s leaf warblers, Hartert’s has the habit of flicking its wings alternately; compare to Kloss’s and Davison’s leaf warblers, which flick both wings at the same time. Bright olive above with a broad yellow brow and yellow-suffused white belly. Crown stripe and broad, orange-based bill distinguish this species from the similarly sized and shaped Arctic Warbler and Pale-legged Leaf Warbler. Breeds in foothill and submontane broadleaf forests, winters in various wooded habitats at lower elevations, including forest edge. Song is a sweet, high-pitched “wit-wichichew-wichichew-wichichew.” Call is a quiet “wit” or “wichichew.”