wood, I saw a pair of Rivoli Hummingbirds in the box canon, but did not find their nest. They may belong to the nest I found yesterday June 18. In the morning I stayed in Camp while the others went after Swift eggs. They got a set of three eggs out of the nest in which they found a single egg on the 9th. Rising shot a Redstart. It was cloudy all day, and in the afternoon we had thunder showers June 19. In the morning Howard went over on to the cliff after swifts. He managed to get to a nest but could not reach into it. Each nest he had examined, the bird remained in, and could not be forced out of, crouching back in the crevice, out of reach. Afterward we went up the canon. We caught a immature Rivoli Hummingbird in the butterfly net. We also shot an adult male Rivoli Hummer, a Broad-tailed Hummer, two Ridelats, and a female Hepatic Tanagers. Howard took the Tanagers nest and eggs. I saw a California Cuckoo, but could not get it. In the afternoon it rained very hard. June 20. Will and I stayed in camp and skinned birds, and the others went over to Carr Canon. They returned with two Long-tailed Jays, two Red-faced Warblers, two Arizona Junco, three Arizona Woodpeckers, and a Painted Redstart. They found an Arizona Junco's nest with young, in the brushroot of an old dugout. They found a Red-faced Warbler's nest with young and saw other young ones flying around. They also took a set of Western Flycatcher.