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Southern Beardless Tyrannulet - BirdForum Opus

Subspecies sclateri
Photo © by Stanley Jones
El Oro Province, Ecuador, November 2014
Camptostoma obsoletum


9·5–10·5 cm (3¾-4 in)

  • Brown head
  • Bushy crest
  • Pale supercilium
  • Olive-grey upperparts becoming paler on the rump
  • Brown wings
  • Yellow feather-edging
  • Two white, yellow or cinnamon wing bars
  • Brown tail
  • Grey throat
  • Yellow breast and abdomen
  • Black bill (pale base to lower mandible)
Nominate subspecies
Photo © by bievreJJ
Vale das Garças, Campinas, SP, Brazil, 23 September 2017


Central and South America:
Central America: found in Costa Rica, Panama, Trinidad
South America: Colombia, Venezuela, Guyana, Suriname, French Guiana, Ecuador, Peru, Bolivia, Brazil, Paraguay, Uruguay, Argentina



This is a polytipic species consisting of 13 subspecies[1]:
Northern Group

  • C. o. flaviventre: Pacific coast of south-western Costa Rica and Panama
  • C. o. orphnum: Coiba and Cébaco islands (Panama)
  • C. o. majus: Pearl Islands (Panama)
  • C. o. caucae: Colombia (Western Andes, Cauca and Magdalena valleys)
  • C. o. pusillum: Caribbean coast of northern Colombia and northern Venezuela; Trinidad
  • C. o. napaeum: Extreme south-central Venezuela to the Guianas and northern Brazil
  • C. o. olivaceum: South-eastern Colombia to eastern Ecuador, north-eastern Peru and western Brazil (western Amazonas)

Southern Group

  • C. o. sclateri: Tropical western Ecuador and extreme north-western Peru (Tumbes and northern Piura)
  • C. o. maranonicum: Northern Peru (middle Marañón Valley)
  • C. o. griseum: Arid littoral of western Peru (Lambayeque to Lima)
  • C. o. bolivianum: Central Bolivia to north-western Argentina (Tucumán)
  • C. o. cinerascens: Eastern Brazil (Maranhão to Ceará and Mato Grosso) and western Bolivia
  • C. o. obsoletum: South-eastern Brazil to Uruguay, Paraguay and northern Argentina


A variety of scrubby habitats (including urban), tropical savanna, dry forest and stubble. Observed at heights between 400-600 m.



The diet consists of insects and spiders; also berries (particularly mistletoe) and small fruit.


They build a domed nest, with a side entrance, from plant fibre or leaves. It is placed by a tree fork, often near a wasp nest. The clutch consists of 2 white eggs, marked with rufous and lilac. The female incubates the eggs for 14-15 days. The young fledge 17 days later.


Recording by dominic.patagonia
Colon, Panama, January 2016


  1. Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2016. The eBird/Clements checklist of birds of the world: v2016, with updates to August 2016. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
  2. Avibase
  3. Handbook of the Birds of the World Alive (retrieved February 2015)
  4. Wikipedia
  5. BF Member observations

Recommended Citation

External Links