Cliff Swallow 23. Mayhew 1951 March 23 Univ. of Calif. campus, Berkeley, Alameda Co., Calif. As yet, no cliff swallows have returned to the south side of Life Sciences Building. A number of last year's nests are still present, and appear to be in rather good shape, too. March 24 Bridge, 10 mi. west, 1[illegible] mi. south of Turlock, Stanis. Co., Calif. No birds have made their appearance here as yet. Last year's nests are nearly all destroyed - a few complete nests remain. There is plenty of mud close at hand to build new nests. Crows Landing Bridge, 8 mi. W., 4 1/2 S. of Turlock, St. Co., Cal. This bridge is about 2 1/2 miles, airline, from the previous bridge. However, a large number of birds are already here. The majority of the nests look completed, or nearly so. April 11 Berkeley campus, Univ. of Calif, Alameda Co., Calif. Today was the first time I have seen ciff swallows around the Life Sciences Bldg, so far this year. There were about 2 dozen of them circling near the building about 11 A.M. However, when I looked again at 1 P.M. and at 3 P.M., I could see none of them. Again at 5 P.M., though, I could see 5 or 6 circling near the building. April 22 Bridge, 10 mi. W., 1[illegible] mi. S. of Turlock, Stanislaus Co., Calif. Still no swallows using either of these two bridges for nesting.