Davis 948 Red's Meadow, 7500 ft., Sierra Nat'l Fes., Madera Co., Calif. July 13, 1948 Sterkweather Lake late in a.m. Nothing of interest, save for Mountain Chickadee repeatedly entering nest hole in dead conifer, about 8 ft from ground. This nesting bird had also been seen July 11. July 14, 1948 Hunted all the way around Rockher Lake in a.m. Saw 2 Garter Snakes, collected one. Birds few & not particularly interesting. In camp in p.m. July 15, 1948 In a.m. went to Rainbow Falls. At 8:20 a.m. saw about 10-12 Blackswifts wheeling over the falls, and diving down and circling over the river below the falls. Several birds were in pairs, chasing one another. At 8:35, they disappeared, apparently flying behind the falls and hanging up. Went to another smaller falls about 'r mile below Rainbow Falls, and at about 9:15 saw 5 Swifts circling over the forest at a great height. Went about 'r mi. farther downstream, then returned to Rainbow Falls. Swifts came out again at 11 a.m., about 12-15 birds. They circled and dove for a while, then disappeared. Two were seen hanging up on the sheer rock wall of the west bank right next to the falls.