Western Meadowlark, House Finches (ab.), Willow Goldfinch, Greenbacked Goldfinch, Song Sparrow, Nuttall Sparrow, Spotted Towhee, Lazuli Bunting (1 sang near tunnel), Cliff Swallows (Ft. Barry), Barn Swallow, Lutescent and Paleolates Warblers, Verger Wren, Titmouse, Chickadee (one at Ft. Baker), Bushtit, Wrentit, Russet-backed Thrush. 41 species. House Wren found box on house in Berkeley and began singing and carrying in sticks, May 4. House Wren sang all day - usually once every 10 seconds - May 5. Cloudy with rain. House Wren still singing - no mate. May 6. Clear. House Wren still singing and carrying in fine materials for nest. W. Flycatchers have built a nest under living room porch. May 7. Looked into Lutescent Warbler's nest at noon. Young well feath- ered. While I was away Mrs. Saunders came and asked Mr. A. to show her the nest. Young birds flew, old birds much excited, pretended to have broken wing. Three young - two eggs left in nest. When I returned young were perched in wild cucumber just above the nest. Beautiful day. Chilly at night. Robin in garden, singing often. May 8. Weather still fine. Lutescent warblers (young) near drinking fountain in morning, in small red-woods below clothes lines in afternoon. Titmouse still feeding young in box. House Wren sang 36 times in 5 minutes. Still no mate. Heard Hutton Violes. May 9, 10. House Wren sings constantly. No mate. Nest in box finished - Titmouse feeding young. W. Flycatcher's nest finished. Thrush singing often.