May - June 1921 Boulder Creek. May 30. Cloudy but no rain. Walked along Alta Via a.m. Mr: May 31. Warmer. Three Cliff Swallows nests on building next to wood yard where there were dozens last year. Persecuted by boys last summer. June 1. Went into sand-hill country which we passed this' on delow to Santa Cruz. Vegetation very inter- esting. Large Yellow Pines, smaller Knob-cone Pines (many of latter burned but with cones still clinging) Many desert flowers - Turk's poppies, Turk's poppies, larkspurs. Followed up a low sandy ridge. As we neared the top, began to hear the notes of the mystery bird very near by. Soon found it was the W: Purple Martin. Several pairs were nesting in a dead Yellow Pine at the top of the ridge. A pair of Piggmy Nuthatches nested in the hole at the top of the tree and a pair of Bluebirds seemed interested in the lowest hole. Other birds seen in the region were: