The Bolivian tyrannulet is a species of bird in the family Tyrannidae, the tyrant flycatchers. It is found in Bolivia and Peru.
Region
Andes Mountains
Typical Environment
Occurs on the east Andean slopes of Bolivia and adjoining southern Peru, especially within the Yungas belt. Prefers humid and subhumid montane forests, forest edges, and tall second growth. Most foraging takes place in the mid to upper canopy, but it also works along forest margins and gaps. It adapts reasonably well to selectively logged areas and mature secondary woodland, provided a closed canopy remains. Riverine corridors and bamboo-rich patches are also used locally.
Altitude Range
600–2400 m
Climate Zone
Highland
Ease of Keeping
Beginner friendly: 1/5
The Bolivian tyrannulet is a tiny Andean flycatcher that favors the mid to upper canopy of humid montane forests. It is often detected by its thin, high-pitched trills more than by sight. This species frequently joins mixed-species flocks, where it actively gleans small insects from foliage. Subtle plumage makes voice and behavior key to identification.
Temperament
social and active
Flight Pattern
short rapid wingbeats between perches
Social Behavior
Usually found in pairs or small family groups and commonly joins mixed-species flocks. Nests are small cups placed well-hidden in foliage or suspended from fine branches. Pairs maintain small territories but are tolerant of other small insectivores in foraging flocks.
Migratory Pattern
Resident
Song Description
Gives thin, high-pitched trills and sibilant tseet notes, often delivered in brief series. The song carries well in the canopy and is used frequently while foraging.
Plumage
Olive-green upperparts with slightly paler, yellow-washed underparts; two narrow pale wingbars and dusky wings. Subtle pale supercilium and faint streaking or shading on the throat are sometimes visible. Feathers appear neat and smooth, suited to a slim, active canopy forager.
Diet
Primarily takes small insects and other arthropods, which it gleans from leaves and twigs. Employs hover-gleaning and short sallies to pick prey from foliage. Occasionally consumes tiny berries or fruit when insect prey is scarce.
Preferred Environment
Feeds mostly in the mid to upper canopy along forest edges, gaps, and mature second growth. Also forages along streamside vegetation and in bamboo thickets within montane forest mosaics.
