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) [XC100906]
by Paul Marvin from Cherokee Creek, at the Little Snake River, Moffat Co., Colorado, United States (song)
American Grey Flycatcher (Empidonax wrightii) [XC124819]
by Richard E. Webster from Arrastre Creek at 2N02, San Bernardino Mountains, California, United States (call)