Chapim-montês Poecile montanus

Active little inhabitant of coniferous and mixed forest, birch woodland, willow and alder scrub. Very similar to Marsh Tit, and often best separated by its differently whistled song (more helpful in western range than in eastern). Gives various high-pitched and scolding calls; generally narrower vocal range than Marsh Tit. Often in scrubbier habitats than Marsh Tit; sometimes visits feeders. On Willow Tit, note pale wing panel (vs. rather plain wings of Marsh), slightly larger and messier black bib, and brighter buffy flanks.