Common Yellowthroat
Very easy to detect by sight and song, and fairly easy to confirm breeding.

Challenge: Determine if this species still breeds in the Columbia Basin (Sherman, Gilliam, Morrow, Umatilla Counties), and at very high elevations in the Cascades and Wallowas. Search for additional nesting locations in Wallowa, Grant, Malheur, southern Klamath, and Jackson Counties.