Zimmer's Tody-Tyrant

Zimmer's tody-tyrant is about 10 cm (3.9 in) long and weighs 6 to 8 g (0.21 to 0.28 oz). The sexes have the same plumage. Adults have a dark brown-olive crown with even darker dusky streaks. They have buffy lores, an indistinct buffy eye-ring, and brown ear coverts. Their back and rump are brownish olive. Their wings are dusky with yellow edges on the flight feathers that give a two-toned effect. The wing coverts have yellowish to yellowish green tips that show as two distinct wing bars. Their tail is brownish olive. Voice: The song of Zimmer's tody-tyrant is a "simple, high, rather sharp 'wtttti' trill (fast, upslurred 'w' colliding with the 1st 't')". The species' vocalizations are described as ventriloquial, making the bird hard to locate.