Sulphur-bellied Tyrant-Manakin

The sulphur-bellied tyrant-manakin is 13 to 13.5 cm (5.1 to 5.3 in) long and weighs 14 to 19.4 g (0.49 to 0.68 oz). The sexes have the same plumage. Adults have a partially hidden, pale sulphur-yellow stripe on the crown. The rest of their face and their upperparts are dull olive-green. Their wings and tail are a slightly browner olive-green. Their throat is dull grayish white, their upper breast grayish olive, and their lower breast and belly pale sulphur-yellow. They have a pale grayish to creamy or orange-brown iris, a brownish and longish bill, and grayish legs and feet. Voice: The sulphur-bellied tyrant-manakin's calls include "a squeaky dueek or duet in short series a scratchy series of djurt or djurit notes".