識別
Small warbler with sharply pointed bill. Look for gray head, white eyering, yellow underparts (including throat), and olive upperparts. Sometimes pumps tail. Two disjunct breeding populations are very similar in appearance. Breeds in coniferous or mixed forests, often near clearings, second-growth, or bogs. In migration and winter, tends to be found in patchy woodland or brushy areas, including field edges and thickets. Winters primarily in Mexico. Listen for its loud chipping song, broken into two parts. Compare dull immature Nashville with Virginia’s Warbler; Nashvilles always have greenish wings. Also sometimes mistaken for larger gray-headed warblers like Mourning or Connecticut, but Nashville is much smaller, shorter-tailed, and sharper-billed.