FAP 1961 Calyptr anna. 4 May Berkeley, California pre-dive rise, direct, continuous and at constant speed, to about 30 feet above the spot where he poised momentarily. At the end of his rise he was about 45 feet above the ground. He then dropped down foraging, without completing a display but in about 15 seconds he repeated this to the same right approximately, performance, rising and then completing a dive, coming down to the road-side of the tall camellia and swinging through a broad arc going 20-25 feet at the bottom of the dive. Except for a slight swish sound of the bird moving rapidly through the air, the dive was silent. I was a few feet to the house-side of the axis of this dive, standing in a shadow, and in good sunlight of the whole area. No other hummer was present but a bee was buzzing about the camellia blossoms near the top, on the side closest to the air space where the hummer was feeding. The hummer remained and for after the dive, sat tranquilly, then perched on a wire over the area, sang intermittently for a minute or so, and then moved to the NW corner of the house, to a patch of sumac trees overlooking a slope, his usual post.