Reiser's Tyrannulet

Reiser's tyrannulet is 11 to 11.5 cm (4.3 to 4.5 in) long and weighs 7 to 8 g (0.25 to 0.28 oz). The sexes have the same plumage. Adults have a bright olive crown, nape, back, and rump with faint grayish tips on the crown feathers. They have yellowish white lores, supercilium, and cheeks and a thin olive line through the eye. Their wings are dusky with pale yellowish edges on the flight feathers and the ends of the coverts; the last show as two bars on the closed wing. Their tail is dusky olive. Voice: The song of Reiser's tyrannulet is a "series of rough, liquid notes moving down the scale, 'briu-briu-briu-briu-briu-briu-briu' ".