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Peruvian Tyrannulet - BirdForum Opus

Photo © by Thibaud
Bosque de Sho'llet, Pasco, Peru, 27 January 2020

Alternative name: Tschudi's Tyrannulet
Includes: Loja Tyrannulet

Zimmerius viridiflavus


12 cm.

  • Pale yellow loral bands meeting narrowly over bill
  • Pale yellow broken eyering
  • Bright olive auricular patch washed with buff
  • Bright olive upperparts, crown darker olive to greyish-olive
  • Dark dusky wings with bright yellow-green edges
  • Dusky olive tail
  • Pale yellow throat
  • Olive-yellow breast and flanks, flammulated with olive
  • Bright yellow belly

Sexes similar, juveniles undescribed.


Found in Southwest Ecuador and on the eastern slopes of the Andes of Peru (Huánuco to Junín).
An uncommon to fairly common restricted-range species.


By location, this bird should belong to a population which has uncertain affinities, it might belong to Golden-faced Tyrannulet
Photo © by lior kislev
La Esperanza, Peru, February 2010

Often treated conspecific with Golden-faced Tyrannulet. Formerly also placed in a separate genus, Tyranniscus.


Two subspecies are recognized[1].

  • Z. v. flavidifrons
    • Southwest Ecuador (southeast Guayas to western Loja and El Oro) to extreme northern Peru
  • Z. v. viridiflavus
    • Eastern slope of Andes of Peru (Huánuco to Junín)

Gill and Donsker recognise Loja Tyrannulet, Z. flavidifrons as a separate species[3]

Subspecies flavidifrons, Loja Tyrannulet
Photo © by Stanley Jones
Buenaventura Reserve, El Oro Province, Ecuador, November 2014


Found in humid montane forest and forest edge, also sometimes in second growth.
Occurs at 800-2500 m.



Feeds on insects. Takes probably also mistletoe and other small berries.
Forages singly or in pairs, often following mixed-species flocks in forest canopy.


No information.


A resident species.


  1. Clements, J. F., T. S. Schulenberg, M. J. Iliff, S. M. Billerman, T. A. Fredericks, J. A. Gerbracht, D. Lepage, B. L. Sullivan, and C. L. Wood. 2021. The eBird/Clements checklist of Birds of the World: v2021. Downloaded from https://www.birds.cornell.edu/clementschecklist/download/
  2. Del Hoyo, J, A Elliot, and D Christie, eds. 2004. Handbook of the Birds of the World. Volume 9: Cotingas to Pipits and Wagtails. Barcelona: Lynx Edicions. ISBN 978-8487334696
  3. Gill, F, D Donsker, and P Rasmussen (Eds). 2021. IOC World Bird List (v 11.2). Doi 10.14344/IOC.ML.11.2. http://www.worldbirdnames.org/

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