Mayhew 1951 Mallard 32. May 11 Conaway Ranch, 2 mi. east of Woodland, Yolo Co., Calif. by a ♂. The remainder of the ♂ were seen either singly or in groups up to 5. From what I saw, I would judge the breeding population to be the same, or slightly smaller than, last year. 1952 Conaway Ranch, 2 mi. east of Woodland, Yolo Co., Calif. Mar. 15 Almost all the Mallards seen today along the south boundary of the ranch were paired up. There was no sign of territorial activity, yet, however. April 26 Chiles Ranch, 3 mi. N.E. of Davis, Yolo Co., Calif. One pair was seen on a small pond just west of the barn. A ♂ was flushed from a pond at the south edge of the ranch. It circled the area several times, then was joined by a ♀, & both circled until I left the pond. About 3 dozen birds, mostly ♂s, were found on some rice paddies that were just being flooded at the S.E. corner of the ranch. Another pair were flushed from a drainage ditch, right beside the water tank + windmill on the eastern boundary of the ranch. 1 A ♀ + 6 young were seen in the large drainage ditch across the road on the north boundary of the ranch. They were about .2 mile east of the ranch building. As I drove by, all of them were flattened out in the shallow water with just