Plumbeous-crowned Tyrannulet

The plumbeous-crowned tyrannulet is about 11.5 cm (4.5 in) long. Males weigh about 11 g (0.39 oz) and females about 8 g (0.28 oz). The sexes have the same plumage. Adults have a gray crown and bright olive nape, back, and rump. Their lores and supercilium are white with a dusky stripe through their eye. Their lower face is pale gray or whitish. Their wings are dusky with yellow to yellowish white edges on most flight feathers and the ends of the coverts. Their tail is dusky olive. Their throat is grayish white, their breast and flanks yellow with an olive wash, and their belly bright yellow. Voice: The plumbeous-crowned tyrannulet sings more loudly than expected for its small size. One description of its song is "a series of 5-8 short hard notes 'pik pik pik pik pik'...given at relatively long intervals". Another is "a slightly accelerating, rising or rising-falling series of sharp, moderate-pitched notes: pip-pip-PIP-PIP-PIP-pip, sometimes ending with a lower trill: pip-pip-PIP-PIPtrr.