Tawny-rumped Tyrannulet

The tawny-rumped tyrannulet is about 10 to 11.5 cm (3.9 to 4.5 in) long and weighs about 8 to 9 g (0.28 to 0.32 oz). The sexes have the same plumage. Adults have a dark brown crown. Their nape and back are brownish olive and their rump and uppertail coverts bright cinnamon. They have white lores and supercilium. They have a thin dark line through the eye and a grayish lower face. Their wings are dark brown with two bright buffy bars, yellow edges to the inner flight feathers, and bright orange-buff edges to the outer ones. Their tail is dusky. Voice: The tawny-rumped tyrannulet's song is an "nconspicuous 2-note 'tseep-tseep' or 'tzeep, zéé-u', singly or in series", and is sung most often in the early morning. It has also been put into words as "tzeep, TEASE-you", "pseee-psít", and "squee squeeze-it".