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Black-bellied Thorntail - BirdForum Opus

Subspecies melanosternon
Photo by Luis R
San Martin, Amazonia, Peru, March 2018
Discosura langsdorffi

Popelairia langsdorffi


Male 12–13·7 cm (4¾-5½ in; including long tail); female 7·4–7·6 cm (3 in)

  • Black bill, short and straight


  • Emerald-green crown and throat


Subspecies melanosternon
Photo by Luis R
San Martin, Amazonia, Peru, March 2018

South America: found from Brazil to Venezuela, Colombia, and Peru.


Discosura vs. Popelairia

Sibley & Monroe (1996) place Wire-crested Thorntail (popelairii), Black-bellied Thorntail (langsdorffi), and Coppery Thorntail (letitiae) in the genus Popelairia. However, Howard & Moore (2003) and Clements (2008) place these three taxa in Discosura, and Opus follows.


Two subspecies are recognized[1]:

  • D. l. melanosternon:
  • D. l. langsdorffi:
  • Eastern Brazil (Bahia, Espírito Santo and Rio de Janeiro)


Humid lowland forests and forest edges generally from 100-300 m.



Their diet consists of arthropods and nectar.


They construct a cup-shaped nest from soft down.


  1. Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2017. The eBird/Clements checklist of birds of the world: v2017, with updates to August 2017. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
  2. Handbook of the Birds of the World Alive (retrieved October 2015)

Recommended Citation

External Links

GSearch checked for 2020 platform.