Chestnut-headed Sparrow-Lark

A medium-sized, rather robust and long-tailed warbler, with a noticeably stout bill. Variable plumage, from bright adult males with extensive yellow throat to extremely dull grayish-brown immature females. Always look for two white wingbars, diffuse streaking on the sides of the breast, large bill, and long narrow tail with a shallow notch. Well-named: almost always found in pine trees throughout the year. In spring and summer, listen for loud musical trill (compare with Chipping Sparrow and Dark-eyed Junco). Occasionally visits feeders, especially for suet. A short-distance migrant, wintering entirely in the United States.

Tiny, stumpy bird of dense undergrowth. Male is dark slate-blue with broad white eyebrows that give him the appearance of a furious little old man. Female is warm pale brown all over. In areas of overlap with Chinese and Lesser Shortwings, look out for the all-dark lower belly, which is white in those species. Inhabits hill and montane forest, where it forages in dense undergrowth, frequently in proximity to streams. Song is composed of high thin whistles with short bursts of clicking chattering mixed in.

Little-known swift found mostly in mountainous areas, though flocks occasionally venture into lowlands. All dark with short square tail and angular wings. Namesake white spots on forehead and behind eyes are distinctive, but these can be extremely difficult to see. Many swifts are best left unidentified. Sex and age variation not well known; some birds, maybe juveniles, can show whitish scaling on belly. Occasionally seen singly or mixed with flocks of other swifts, but most often in monotypic flocks of up to several dozen individuals. Voice can be helpful with practice; typically a staccato chatter followed by “pew pew pew” notes like a laser gun.