Тёмный ополовник Aegithalos fuliginosus

Active little bird with a chocolate-brown chest and a bright white collar. Forages in the lower and middle levels of foothill and montane forest in flocks, often with other species. Overall brownish coloration distinguishes it from similar small tits and bushtits. Like other bushtits, can often be inquisitive and confiding. Gives a trio of high, thin whistles, as well as occasional chatters and trills.