Patelka 1943 June 17 Zoni E. Hayfork, 2400 ft., Trinity Co., Cal. East side of Big Creek; south of the highway. June 18 Investigated some of the dryer, low ridges west of Big Creek. These ridges are a part of the area which appeared to be covered with digger pine as the predominant conifer as we observed the region following our arrival on June 15. The trees on the ridge tops were Pinus sabiniana, Quercus garryana, and only occasional Quercus kelloggii. Manzanita and Ceonothus were common shrubs scattered over the glass-covered ground. Certain slopes and pockets were vegetated with a mixture of young yellow pine and Douglas fir and occasional madrone. The avifauna was surprisingly sparse. Dendroica migrans was the most common species. Others present were Sayarchus americanus, Vermivora ruficapilla, Thryomanes bewicki. Polioptila cerulea, Phebus maculatus, Sarcodcaus mexicanus, Colaptes cafer, Cathartes aura. Some examination was made also of the border vegetation along Big Creek. The west border is a cut bank with typical pine-oak, madrone, and Ceonothus woodland, as described above.