Recent Red-shouldered Hawk range expansion north into Oregon including first specimen record

In this paper we review 46 Red-shouldered Hawk (Buteo lineatus) observation records from Oregon between 1971 and 1983. The literature contained only two records prior to 1971: Johnson's (1880) record without a specific date or locality from the Willamette Valley of western Oregon, and Bendire's (1892) two nests located in 1878 near Camp Harney in eastern Oregon. Gabrielson and Jewett (1940) placed the species on the Oregon hypothetical list because they doubted the validity of the previous identifications. However, Browning (1973) measured the eggs collected by Bendire, reviewed his field notes, and concluded that there was ample evidence the species had occurred in Oregon despite the absence of records for nearly 100 years.