Brown-capped Tyrannulet

The brown-capped tyrannulet is about 8 cm (3.1 in) long and weighs about 7 to 8 g (0.25 to 0.28 oz). It is a small flycatcher with a pointed bill. The sexes have the same plumage. Adults have a brownish olive to dark brown crown with a white forehead, lores, and supercilium on an otherwise olive face. Their upperparts are olive. Their wings and tail are dusky olive. Their underparts are bright yellow with faint olive streaks on the breast and flanks. Both sexes have a brown iris, a black bill with an arched maxilla, and dark gray legs and feet. Voice: The brown-capped tyrannulet's primary vocalization is a "eries of 4–6 high metallic or piping whistles, each slightly downward-slurred, slight pause after first note, 'pee, pey-pey-pew' ". It also makes a "single high-pitched 'peeep' ".