Designed by Paul Smith 2006. This website is copyrighted by law.
Material contained herewith may not be used without the prior written permission of FAUNA Paraguay.
Material on this page was provided by Paul Smith and José Luis Cartes and is used with their permission.
RED-EYED VIREO Vireo olivaceus
Any North American visitor to Paraguayan forest during the summer will be greeted with the familiar song of this abundant migrant species. However they will notice one important difference, the vireos here have brown, not red eyes! A complex pattern of movements and migrations happen in this species which has led ornithologists to split the species into two cryptic forms - the typical northern Red-eyed Vireo which breeds in North America and winters in northern South America and a southern "Chivi Vireo Vireo chivi" which breeds in northern South America and winters in southern South America. However despite the differences in migration patterns the evidence has been insufficient to confirm the existence of two species.
Click on the images to enlarge them.
FIGURE 1 - (FPAVE397PH) Adult, Madrejón, Departamento Alto Paraguay (Paul Smith November 2010).
FIGURE 2 - (FPAVE398PH) Same individual as (FPAVE397PH) lateral view (Paul Smith November 2010).
FIGURE 3 - (FPAVE399PH) Adult, Laguna Capitán, Cuenca Upper Yacaré Sur (José Luis Cartes November 2004).
VIDEO - (FPAVE400VI) Adult, Madrejón, Departamento Alto Paraguay (Paul Smith November 2010).
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Vireo olivaecus
1 (FPAVE401RE) Calls recorded Isla Yacyreta, Departamento Misiones (Paul Smith October 2009).
2 (FPAVE402RE) Calls recorded Isla Yacyreta, Departamento Misiones (Paul Smith October 2009).
Click the link to hear the call. Longer versions of this call can be downloaded from the Paraguay page of our partner website Xeno-Canto - the largest collection of freely downloadable Neotropical bird calls available online.
