Mayhew 1950 March 11 Cliff Swallow 1. Pierce Ranch, 4 mi. west of Davis, Yolo Co., Calif. This afternoon at 4:30 P.M. I went to the bridge over the Winter highway. At first I saw no birds, but in about 3 minutes one bird was seen over the bridge. A few minutes later another bird arrived + joined the first. A short time later 2 more birds arrived. At 4:50 P.M. there were 6 birds flying around the bridge. When I left the bridge at 5:05 P.M. there were 14 birds flying over & under the bridge. The wind was blowing very hard from the north, causing the birds to fly in just over the top of the grass from the south. When they reached the bridge, however, they wheeled + circled around the bridge up to about 50 feet. The following is the arrangement of the old nests under the bridge: N↑ U=good nest Ψ=damaged nest B=Barn Sw. nest 4 3 2 1