Birds Likely to be Observed in Oregon

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

Cassin's Vireo

Vireo cassinii -- Less contrast between head and throat; duller, whitish wing bars and tertial edges; less white in tail. Song is hoarse.

Date of Arrival - Average 4-16 - Early 4-7 - Late 5-5