Olive-sided Flycatchers are large with a relatively short tail, and have a white center on their breast which contrasts sharply with gray sides, giving a vested appearance. Juveniles are similar to adults, however, their upperparts are more brownish and wing feather edges washed buff.

References cited in Species Profile

• Altman, Bob and Rex Sallabanks. 2012. Olive-sided Flycatcher (Contopus cooperi), 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/502
• Audubon Minnesota. 2014. Olive-sided Flycatcher Minnesota Conservation Summary. http://mn.audubon.org/sites/default/files/documents/olive-sided_flycatcher_conservation_summary_12-31-2014.pdf
• Cornell Lab of Ornithology. 2015. Olive-sided Flycatcher. All About Birds. http://www.allaboutbirds.org/guide/Olive-sided_Flycatcher/id
• Sauer, J. R., J. E. Hines, G. Gough, I. Thomas, and B. G. Peterjohn. 1997. The North American Breeding Bird Survey: results and analysis. Version 96.3. Patuxent Wildl. Res. Center, Laurel, MD. [Online.] http://www.mbr-pwrc.usgs.gov/bbs/