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Yellow-green Vireo - BirdForum Opus

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Photo by firecrest15
Buena Vista Hotel, Alajuela, San Jose, Costa Rica, May 2009
Vireo flavoviridis


14–14.7 cm(5.5-5.75 in)

  • Olive-green upperparts
  • Dusky-edged grey crown
  • Dark line from the bill to the red-brown eyes
  • White supercilium
  • White underparts
  • Yellow breast sides and flanks


  • Duller
  • Brown eyes
  • Brown tint to the back
  • Less yellow on the underparts
Photo by Moaom
Coba, Yucatan, Mexico, July 2008


Breeds from Mexico and the extreme south of Texas (Rio Grande Valley) to central Panama, mostly migrant with wintering grounds from Colombia and Venezuela south through Peru, to western Brazil and Bolivia. A few are probably present during any month in Panama4.


Yellow-green Vireo was in the past considered conspecific with Red-eyed Vireo.


There are 3 subspecies[1]:

  • V. f. flavoviridis:
  • V. f. forreri:
  • Western Mexico (Sonora to Jalisco) and Tres Marías Islands
  • V. f. insulanus:
  • Pearl Islands (Gulf of Panama); winters to upper Amazonia

Subspecies insulanus is included within flavoviridis by some authors while perplexus has been proposed as a new subspecies5.


Seems plastic in its habitat choice, mostly in open and semiopen areas when breeding in Panama4 but more in forest and semiopen areas in South America during winter2.



Song is often repeated and consists most often of two syllables per phrase put together in a hesitant series with a few single syllable phrases. The song is more monotonous than Red-eyed Vireo, and contains chirps that make some observers think of House Sparrow. This bird can sing all day.

Calls range from raspy to mewing, often with a nasal quality.


The female builds a cup shaped nest from plant materials. The clutch consists of 2-3 white eggs with brown marks, which are incubated by the female. Both adults feed the young.


The diet includes insects gleaned from tree foliage, especially caterpillars and beetles, also small fruits, including mistletoe berries.


  1. Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2015. The eBird/Clements checklist of birds of the world: v2015, with updates to August 2015. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
  2. Restall et al. 2006. Birds of Northern South America. Yale University Press. ISBN 9780300124156
  3. Dickinson, Edward C. (ed.). 2003. The Howard and Moore Complete Checklist of the Birds of the World. 3rd ed. Princeton: Princeton University Press. ISBN 9780691117010
  4. Ridgely & Gwynne 1989. Birds of Panama. Princeton Paperbacks. ISBN 0691025126
  5. Birdforum thread discussing the taxonomy of Yellow-green vireo.
  6. Howell & Webb, 1995. A guide to the birds of Mexico and northern Central America. Oxford University Press. ISBN 0198540124
  7. HBW-alive
  8. Wikipedia

Recommended Citation

External Links

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