Cogswell 1950 Vireo gilvus 5 Aug.8 near Sugar Bowl Lodge [see p.1]. 2+ heard calling & 1 singing in a near the "cogswell meadow" (willows) & adjacent forest. Aug.12 2 seen in dense conifer forest (not singing) with many warblers. Aug.14 1- Ditto. Aug.22 Onion B. Canyon, 6050 ft., 2 mi. W, 3 mi. S Donner Pass, Placer Co., Calif - 2 heard (calling), one in black cottonwoods along stream, the other in mountain alder thicket near small muddy pool in tiny meadow. Aug.24 Ice Lakes Camp Ground, 6900 ft., 3 mi. W, 1 mi. S Donner Pass, Placer Co., Calif - 1 came thru dead brush dense at edge of 1/2 acre pool in forest to get to the water's edge without making a long flight in open. The tree canopy is (other than at the brushy spot) about 30 feet from the water, which distance seemed reluctant to cross. [see also vermisora plata, Dendroica auduboni] = General: The foraging habitat of this spx, although apparently always including some broad leaved growth, also takes in a considerable portion of any adjacent conifer forest. The June 17 most described above is not the only one we found in conifers, several being located thus in 1948. At altitudes low enough to have tall riparian trees & brush, this species is nearly restricted to them, or to black oaks.