Lake Tahoe and mt. Chickadee - probably about as low as they breed (about 4000ft.). Calif. Purple Finch. No birds June 27. We left Alta about 9 a.m. and drove on to Lake Tahoe. I heard my first Olive- sided Flycatcher just below Blue Canyon. Went to Mrs. Hamlin's Cottage at the north end of Lake Tahoe (4 miles beyond Tahoe City). Beautiful weather. Song Sparrow on Truckee River. June 28: Mrs. Nauvin and I took a short walk from 10-11 a.m. to watch birds. They were especially abundant in the woods along the edge of the willows in a little draw. Among the willows we heard Paleolated & Yellow Warblers, Tolorsi Warblers, Sulphurant Warblers; in the woods Audubon Warblers. Also Olive-sided & Western Wood Pewee, Blue jay; Mt. Chickadee, Red-breasted & Slender-billed Titmouse, Sierra Creeper (song), Rob. Thrush, Robin, R.C. Wrenlet, Warbling Cassin Vireo, Tanager, Cassin Purple Finch, Eastern Yosemite Sparrow, Sierra Junco, Chipping Sparrow, Mt. White-crowned Sparrow, In the afternoon a pair of Green-tailed Tortoises were very fat at the hammock where I was resting and I saw one catch a pine beetle. Juncoes had young in the nest near the garage and Audubon Warblers had young on the wing calling continuously for food. At least two flickers were calling and I watched a Calliope Hummer feeding on Indian Paint brush - the pendulum almost flat and the whistle a burrrr - Back very green