Location in Oregon
Blue is Winter range - Red is Summer range
Purple is Year-round range - Yellow is Migration range

Hutton's Vireo

Vireo flavifrons - Common in evergreen oaks; also found in pines and firs. Note the two distinct wing bars. Told from other vireos by incomplete spectacles that do not join above the eye; from its heavier bill, by having its paler wing and sluggish actions; also by its distinctive song, which is a monotonous repetition of a 2-note phrase accented on the highest note, 60-75/min.