Family Tyrant-flycatchers (Tyrannidae)

Least Concern

Bolivian Tyrannulet (Zimmerius bolivianus)


French: Tyranneau de Bolivie German: Olivkleintyrann Spanish: Mosquerito boliviano

Muscicapara boliviana


, 1840,

Yungas, Bolivia


Birds from C & S Peru named as race viridissimus, on average perhaps slightly yellower below than those in Bolivia, but individual and age-related variation in this character appears greater than any detectable geographical difference. Monotypic.


E Andes from C Peru (N Ayacucho, Cuzco, Madre de Dios, Puno) S to C Bolivia (La Paz, Cochabamba).

Descriptive notes

12 cm; 10–11·6 g. Exceedingly drab tyrannulet with no facial markings. Has crown, upperparts and face dark olive; wings dark dusky, wing-coverts, inner remiges and... read more


A series of high, thin whistled notes, ascending and at end suddenly falling, “wheee, wheee, wheee... read more


Humid montane forest, including mossy cloudforest, also adjacent second growth and clearings; 1000... read more

Food and feeding

Insects; also small fruits, especially of mistletoe (Loranthaceae). Forages singly or in pairs in forest canopy; sometimes joins mixed-... read more


Not documented.



Status and conservation

Not globally threatened. Restricted-range species: present in Peruvian and East Andean Foothills EBA and Bolivian and Peruvian Lower Yungas EBA. Fairly common to common. Is... read more

Recommended citation

Fitzpatrick, J. & Christie, D.A. (2019). Bolivian Tyrannulet (Zimmerius bolivianus). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from on 7 December 2019).