Mayhew 1950 Cliff Swallow 4. April 1 Poleline Bridge, 3 mi. N.E. of Davis, Yolo Co., Calif. Tonight I tried a new net to catch the swallows as they left the nest, but it was of no value to me. I finished by using my old net. A ? English Sparrow was roosting in nest 3-30. I couldn't see if there was a nest started by English Sparrows inside of it or not. One of the pair of swallows in 3-29 escaped me, the other was caught but was injured so badly I had to kill it. The net swung against the bridge support after the bird was caught. One return was recorded out of the 8 birds I caught. 44-54394 was taken from nest 4-2. The ones that were banded were taken as follows: 49-25533 - 3-48 or 47 49-25534 - 3-4 49-25535 - 4-4 49-25536 - 4-9 49-25537 - 4-2 49-25538 - 3-57 April 2 At 8 A.M. I passed this bridge and found most of the birds either adding mud to repair old nests or building new ones. Most of the new ones seem to be in section 2. When I passed again at 3:15 P.M. the birds were all feeding high in the air around the bridge. April 22 This afternoon I numbered all the new nests that have been put up this year.