1/heard the note of the Collidge Hummer (7) more distinctly. April 20: Chilly fog most of day. University sprayed the trees near our place. In late afternoon a flock of Golden- crowned Sparrows came to bathe, many singing. With them was one (possibly two) Gambel Sparrows and one Fox Sparrow. There was quite a little fighting directed mainly against the Gambel Sparrow which was driven away from the pool many times. All in full plumage except one Goldencrown. A Hermit Thrush was in the garden today and robins eating cater worms. Mrs. Kimball reported Russet-backed Thrush. Apr. 21. Cool with morning high fog. Went to San Mateo Bridge for shore birds - stopped in a canyon in the mining region north of Leona Heights where I certainly heard a Chuck-adee. At the bridge there were many thousand birds: Godwits (most in full plumage) and Black-bellied Plovers most abundant, Sandpipers (Western and Red backed in full plumage), many Dowitchers, some Knots seen very distinctly, many Hudsonian Curlews and some Willets, a few Dun-palmereds Plover and a few St. Blue Herons. As we stopped before reaching the bridge two Clapper Rails were seen in the slough. While crossing the bridge Bonaparte Gulls and Caspian Terns were seen and at the west end 20+ Forster Terns. There were many Cliff Swallows on the salt ponds as we drove south toward Dimbarlan Bridge and on the roadway were numerous jays in addition to a few flocks of sandpipers. Eared Grebes (two small flocks) were just changing into summer plumage. Very few gulls except Bonapartes which were very numerous. I heard several Yellow Warblers as we drove along the Oakland Highway.