Gray Vireos are small, dull gray overall with a thin white eye ring. A white spot in front of their eyes makes faint spectacles, also donning one faint white wingbar and a relatively long tail. Juveniles are similar to adults, but are more brownish with distinct wingbars.

References cited in Species Profile

• Barlow, Jon C., Sheridan N. Leckie and Colette T. Baril. 1999. Gray Vireo (Vireo vicinior), The Birds of North America Online (A. Poole, Ed.). Ithaca: Cornell Lab of Ornithology; Retrieved from the Birds of North America Online: http://bna.birds.cornell.edu/bna/species/447
• Cornell Lab of Ornithology. 2015. Gray Vireo. All About Birds. http://www.allaboutbirds.org/guide/Gray_Vireo/id
• Garrett, K. and J. Dunn. 1981. Birds of southern California: status and distribution. Los Angeles Audubon Soc. Los Angeles, CA.
• Great Basin Bird Observatory. 2015. Gray Vireo. http://www.gbbo.org/pdf/bcp/61_Gray%20Vireo.pdf
• Hamilton, T. H. 1962. Species relationships and adaptations for sympatry in the avian genus Vireo. Condor 64:40-68.
• New Mexico Department of Game and Fish. 2007. Gray Vireo (Vireo vicinior) recovery plan. New Mexico Department of Game and Fish, Conservation Services Division, Santa Fe, New Mexico. 30 p.
• Sauer, J. R., J. E. Hines, G. Gough, I. Thomas, and B. G. Peterjohn. 1997. The North American Breeding bird survey results and analysis. vers. 96.3. Patuxent Wild. Res. Center, Laurel, MD. [Online.] http://www.mbr-pwrc.usgs.gov/bbs/bbs96.html
• Unitt, P. 1984. The birds of San Diego County. Memoir 13. San Diego Soc. Nat. Hist. San Diego, CA.