Breeding range stretches from southern Texas in the United States south to central Panama. Migrate south to winter in the western Amazon basin.
The adult Yellow-green Vireos are average 14-14.7 cm in length and 18.5 g in weigh. They have olive-green upperparts and a dusky-edged grey crowns. There is a dark line from the bill to the red-brown eyes, and a white supercilicum.The underparts are white with yellow breast sides and flanks.