About Empidonax oberholseri A.R.Phillips, 1939
Description: Adult Empidonax oberholseri have olive-gray upperparts that are darker on the wings and tail, and whitish underparts. They have a distinct medium-width white eye ring, white wing bars, and a medium-length tail. The breast shows a wash of olive-gray, and the bill is mainly dark. This species is slightly smaller than the American grey flycatcher and slightly larger than the Hammond's flycatcher. Distribution: These birds migrate to southern Arizona and Mexico. They are passage migrants moving through the deserts of the southwestern United States – specifically the Mojave, Sonoran, and Chihuahuan Deserts – where they stop along the migration flyway as non-breeding residents in the southern part of their migration range. Habitat: Their breeding habitat consists of mountain slopes and foothills with brush and scattered trees, especially ponderosa pine, across western North America. They build a cup-shaped nest low down in a vertical fork of a shrub.
