either in pairs; or single birds, probably males, sitting and cooing in the tops of trees. Found several Bluebirds nest containing young. There were a good many Pygmy and Slender-billed Phylloscopus in the pines and a few Creeper. Saw several Buff-breasted Flycatchers, but found no nest. Will found a Core's Flycatcher's nest containing young. The others did not return in the evening, so they probably stayed at Postwicks in Bear Canon, overnight. June 29. Will and I stayed in camp almost all day, skimming birds, and in the afternoon walked down the canon, after an Oriole and a Hummingbird's nest. The Oriole had deserted and the Hummingbird's nest was gone. The others returned in the afternoon after going over about the same ground that we covered yesterday. They brought back an Arizona Junco, Lowa Redstart, two Red-faced Warblers, a Western House Wren, three Mexican Creepers, a Long-eared Jay, a Bluebird, a male Rivoli Hummer, a (3) Hummer, and an adult male Olive Warbler. They collected a set of Core's Flycatchers, found several nests containing incomplete set. They also found Bluebirds, Wrens and Robins' nests containing young. June 30. Will and I stayed in camp, and the others went over to Brown's Canon, and the wash below. They shot five Vermilion