English and Scientific names:

Yellow-Green Vireo

Vireo flavoviridis

Number of individuals: 




Specific Locality:

Peveto Woods; BRAS Sanctuary

Date(s) when observed:


Time(s) of day when observed:  

About 2:30 PM

Reporting observer and address:

Paul Conover

Lafayette, LA

Other observers accompanying reporter who also identified the bird(s):

Dave Patton

Other observers who independently identified the bird(s)

YGVI has been seen at Peveto since 5/8. Assuming it’s the same bird, Mac Myers, Phillip Wallace, Gay Gomez, and Gary Broussard have also seen it. Gary had seen it about a week before, and when I contacted him, I learned he had seen (refound?) one—and maybe another—on 05/27.

Light conditions (position of bird in relation to shade and to direction and amount of light):

Not bad. Sunny at beginning of sighting, clouded up but stayed bright, then turned dark in front of heavy rain.

Optical equipment: 

Binoculars, Nikon D50 with 200 mm lens

Distance to bird(s): 

Down to about 10 yards a few times.

Duration of observation:

About 30 minutes; most of time spent peering into clumps trying for clear looks. Dozens of looks of a few seconds were had, and eventually a few wide open looks for up to a minute.


Oak dominated chenier regenerating after heavy hurricane loss in 2005 and 2008. This bird was seen only in Live Oaks.    

Behavior of bird: 

Bird was first seen as it flew in on the same line as a young male Orchard Oriole. No looks were obtained at this time. It was relocated in slightly denser woods in close proximity to a Red-eyed Vireo. When one flew, the other would follow.


They worked deep into oak clumps, and would sit still for minutes at a time, given the impression they had moved on. Because we had the back door covered, we were confident they hadn’t escaped.


Initially the bird was seen in the sparsely wooded lots before the main woods. Eventually the bird worked back to the denser main body of the woods.


At times, the YGVI would find a bare branch and sit in the open. This was especially true after we played a YGVI song to pull the bird from the main body of the woods. It flew out pretty quickly.


 A “Red-eyed” type vireo, larger than typical warblers. Pattern of bird followed basic pattern of REVI, with eyeline, greenish back and whitish underparts, no wingbars. Overall, much warmer in color than REVI.


Strongly yellow-green and yellow. Dorsal color of green highlighted by yellow-green tones, yellowish-green edges of flight feathers, and very visible yellowish bend of wing.


Head patterned superficially as in REVI, with cap, light supercilia, dusky eyeline. However, the cap was less bluish gray, there was little or no darker line of demarcation on the lower edge of crown, the eyeline was broad, dusky, and somewhat diffuse, seemingly broadening behind eye. Auriculars and sides of neck with less of the olive tones of REVI, more yellowish with perhaps a dusky base.


Flanks yellowish, encroaching onto underparts more broadly at the side of breasts near the bend of the wing, and behind the tibia. A light dusky wash crossed the breast fairly broadly, which, mixed with yellow breast sides, created a hooded effect from some angles. Dusky wash also behind tibia. Undertail coverts bright yellow. Rest of underparts whitish, but not appearing as plain and bright as REVI.


Bill appeared longer than REVI, giving head a less blocky, more tapered appearance. Bill was pale, appeared to have pale pinkish/flesh ground color on base of mandible, dusky but pale maxilla and outer half of mandible.


Eyes bright brown or reddish.


Legs and feet pale gray.


Not heard.  

Similar species:

Philadelphia, Warbling Vireos eliminated by size (this bird was seen alongside REVI and was at least equal in size).


REVI eliminated by overall color pattern. 5 REVI were seen on same day, including one in close proximity to this bird. All of these REVI had pale yellow undertail coverts, none of which

Approached this bird’s color intensity.


Other long-shot vireo-like birds such as elaenias eliminated by the fact that this bird matched vireo body form perfectly, and YGVI color pattern.

Photographs or tape recordings obtained?

Photos by both observers.  

Previous experience with this species: 

One previous sighting, at same spot a year earlier.  

Identification aids:


This description is written from: 

Memory the next day.

Are you positive of your identification? If not, explain: 



Date and time: 

May 29, 2010