Mayhew 1949 Mallard 18. July 19 Conaway Ranch, 2 miles east of Woodland, Yolo Co., Calif. I waited for over 5 minutes, but saw no more sign of it. After I returned to the car, I watched the spot for 5 min. more, but there was still no sign of it. July 23 A group of 15 young mallards were seen together on some open water between tules on the large drainage ditch at the south end of the ranch. July 24 Today 32 youngsters were seen in the same area that the group was spotted yesterday. All of them are able to fly. July 26 This morning I made a census on the 160 acres in the S.W. quarter of section 19. A total of 11 mallards were found in that area. Of this total a & with 4 youngsters about 3 weeks old is included. In addition, one nest of 6 eggs, one nest with 2 eggs (no down), + one nest with 4 eggs were all found located on the rice levees of the area under observation. The total of 11 ducks for the 160 acres means an average of 0.069 ducks per acre, or about 1 duck for every 14.5 acres. The corn on the rice levees on this area consisted almost entirely of volunteer wheat that averaged about 3½ feet in height. The nearest grain field is about On the other 160 acres that was used in the census (NW quarter of section 28) a total of 18 mallards were seen. This section is just south of an 800 acre barley field that