Cogswell 1949 Buteo jamaicensis 500 ft. Big Lagoon, Humboldt Co., Calif. Aug. 15 An immature was seen about 4:00 p.m. soaring low over the low shrub-covered ridge just east of the lagoon. Aug. 16 An adult, "red-tailed" bird was seen soaring at about 500 ft. altitude above Maple Creek Valley near our camp (1 mi. E of S.E. end of Big Lagoon) in early p.m. Aug. 19-26 French Camp, 3,100 ft., Humboldt Co., Calif. and "Bald Hills" NW of Schoolhouse Creek, same region. 1 or 2 seen daily, an adult, red-tailed bird screamed when I went onto the NW- facing burned-over slope near camp. Some of those seen (= 2+) were "immature", without the red tail; one of these was seen perching in low tarry oaks; all others used tall dead Douglas firs if they perched. The species seems to avoid the dense forest, but was seen in flight, obviously foraging much of the time over the grassland, the broken grass balds, and over the brush-filled farms and the tarry oak-woodland.