When walking through riparian areas in certain parts of Oregon in summer, one can often hear a song which suggests the Robin's but with less volume and energy, and with a greater variety of phrase. Yet, when one looks up, the bird is often hidden within the canopy foliage.
The Red-eyed vireo is a fairly common summer breeder in Wallowa County and an uncommon to rare breeder in Union County, Baker County, and eastern Grant and Umatilla counties, and northern Malheur County.