Description wikipedia

The bearded tachuri (Polystictus pectoralis) is a Near Threatened species of bird in subfamily Elaeniinae of family Tyrannidae, the tyrant flycatchers. It is found in every mainland South American country except Chile, Ecuador, and Peru. The bearded tachuri is 8 to 10.5 cm (3.1 to 4.1 in) long and weighs 6 to 8 grams (0.21 to 0.28 oz). Adult males of the nominate subspecies have a dusky gray to blackish crown with a bushy but usually flattened crest; the crown's white center is mostly hidden. They have a short white supercilium and a thin blackish line through the eye on a face that is otherwise thinly striped with black and white. Their upperparts are mostly buffy brown with a tawny to rufous rump. Their wings are dusky with bright cinnamon-buff edges on the flight feathers and tips on the wing coverts; the last show as two wing bars. Their tail is dusky. Their chin ("beard") has thin black and white stripes. Their throat and underparts are pale yellowish white with a cinnamon wash on the breast and flanks. Adult females are duller overall than males. They do not have the male's "beard". Their crown and face are mostly brown and their throat is whitish. Juveniles have reddish edges on their flight feathers, buffy wing bars, and deeper yellow underparts than adults. Subspecies P. p. brevipennis is significantly smaller than the nominate; its crest is smaller and males have less black on their face and throat. P. p. bogotensis is quite different from the other two subspecies. Compared to them its crest is thinner and longer, its crown has less white, its supercilium is bright buff, its face ochraceous tawny, its back more tawny, the edges of its flight feathers and wing coverts deeper tawny, its throat nearly all white, and its flanks a deeper and richer tawny. Both sexes of all subspecies have a fuscous brown iris, a black bill, and black legs and feet.