gulbrynsanger Phylloscopus inornatus

Small, active warbler with greenish upperparts, white underparts, distinct pale yellowish eyebrow, and distinct pale wingbars (upper wingbar short and less distinct). Overlaps in range with many other warbler species; compare especially with Hume’s Warbler, Pallas’s Leaf Warbler, and Two-barred Warbler. Breeds in mid- to high-elevation forests and winters in a wide range of wooded and scrubby habitats, where usually rather active; sometimes hovers to pick bugs from leaf tips. Call a distinctive, 2-syllable, upslurred "tsu-weet." Song is a very high, thin series of alternating long and short notes: “tseee-ts’a’wi-tseeeee.”