Davis 1950 7500 feet, Red's Meadow, Sierra Nat'l Forest, Madrona Co., Calif. Aug. 29, 1950 - Sept. 9, 1950. Peromyscus maniculatus. Abundant. Young individuals invaded our food stores every night, and could be felled out by flash- light. Six young live-trapped, three one evening within 15 minutes. Microtus sp. One seen running down trail at edge of creek at Red's Meadow. Odontomys microps. A few do in Red's Meadow. Birds seen this trip not previously noted at Red's Meadow: Tasaki hunting, Croskill, Green-tailed towhee, Fox Sparrow. At Sutter Lake: Spotted Sandpiper, Eared Grebe, Shoveller. Greatest change in mammal population: abundance of Chickarees, formerly rarely heard, even more frequently seen.