Family Hummingbirds (Trochilidae)

Least Concern

Slender-tailed Woodstar (Microstilbon burmeisteri)


French: Colibri de Burmeister German: Rotbart-Sternkolibri Spanish: Colibrí de Burmeister

Chætocercus burmeisteri

P. L. Sclater

, 1888,

Valle del Tafí, Tucumán, Argentina


Affinities uncertain. Monotypic.


C & S Bolivia (from SE Cochabamba and W Santa Cruz) to N Argentina (Jujuy, Salta, Tucumán). Old record from Yungas of La Paz (NW Bolivia).

Descriptive notes

7–9 cm (including tail of c. 3 cm). Male has short, rather straight black bill; upperparts bronzy green; gorget reddish purple, flaring into long moustachial tufts,... read more


Poorly known. Calls while feeding and hovering include a series of dull “chip” notes, sometimes... read more


Shrubby slopes, ravines with vine-tangled thickets, and patches of deciduous woodland at 1100... read more

Food and feeding

Presumably takes insects and nectar from small flowers similar to those visited by Chaetocercus, recorded visiting flowering... read more


A nest in Tajira department, Bolivia, had two eggs in Jan and was in the branch of a tree c. 3 m above the ground. Another nest in... read more


Seasonal altitudinal movements strongly suspected in Bolivia and has even been suggested that... read more

Status and conservation

Not globally threatened (Least Concern). CITES II. Generally not uncommon to common, but often overlooked due to its small size and retiring habits. Life history virtually... read more

Recommended citation

Züchner, T., de Juana, E., Boesman, P. & Kirwan, G.M. (2020). Slender-tailed Woodstar (Microstilbon burmeisteri). 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 9 April 2020).