About Tyranneutes stolzmanni (Hellmayr, 1906)
The dwarf tyrant-manakin, Tyranneutes stolzmanni, measures 7.5 to 9 cm (3.0 to 3.5 in) in length and weighs 6.9 to 10 g (0.24 to 0.35 oz). Both sexes share identical plumage. Adult individuals have olive coloring on the head, upperparts, wings, and tail. Their throat and breast are a paler grayish olive, while their belly is pale yellow. Their iris shows high color variation, ranging from yellowish white to pale grayish or pale brown. They have a dark upper mandible, a paler lower mandible, and grayish legs and feet. This species is native to the western and central Amazon Basin. Its range extends from the southeastern third of Colombia southward through eastern Ecuador and eastern Peru into northern Bolivia, and eastward across southern Venezuela and Brazil. In Brazil, the northern edge of its range roughly follows a line from Roraima west of the Branco and Negro rivers to the Amazon River, and continues south of the Amazon to the Atlantic coast in northeastern Pará and northern Maranhão. The southern edge of its Brazilian range roughly follows a line from Rondônia southeast to southern Mato Grosso, and from there northeast to the Atlantic coast in Maranhão. The dwarf tyrant-manakin primarily lives in the interior of humid terra firme forest, and occurs less commonly in várzea forest. It is rarely found at forest edges or in clearings. It is mostly a lowland species, reaching a maximum elevation of 400 m (1,300 ft) in Colombia, 400 m (1,300 ft) in Ecuador, 800 m (2,600 ft) in Peru, and 300 m (1,000 ft) in Venezuela.
