Breeds extreme south-western Canada (southern British Columbia) and Great Basin states of north-western USA south to south-central California and east to southern Wyoming and central Colorado, locally to western Texas. Winters south-western USA and Mexico (south to southern Baja California and Oaxaca).
 
Population
Estimated population is 1,200,000 (2010).
American Grey Flycatcher (Empidonax wrightii) [XC481990]
by Steve Hampton from FR74 4 crnrs, Elko County, Nevada, United States (call, song)
American Grey Flycatcher (Empidonax wrightii) [XC123906]
by Richard E. Webster from Arivaca Creek, Buenos Aires NWR, Pima County, Arizona, United States (song, song phrases)