Mayhew 1952 April 29 Mallard 34. Conaway Ranch, 2 mi. east of Woodland, Yolo Co., Calif. better wheat that was 30 inches high. The readings were: relative humidity - 48%, temp. 21°C. Readings were then taken waist high (43 inches): rel. humidity - 44%, temp. 18.5°C. A fairly strong S.E. breeze was blowing, but the sky was clear. (at waist height, the rel. humidity dropped to 40% at first, then rose to 44% as the hygrometer cooled to the air temp. at that height.) a number of pairs were seen today, loafing on the large ditch in the center of the ranch, on the newly flooded rice checks, or on the open water on the east side of the ranch that is now flooded from the by-pass. Not many loafing or were seen by themselves. May 1 at 5 A.M. I arrived on the large levee in the middle of the ranch to see which grain fields the pairs would fly & look for nesting sites or to return to nests already established. Only about 2 dozen pairs were seen to fly over the larger wheat fields 2 miles south of ranch headquarters. Even with the aid of glasses very few pairs were seen flying over other areas of the ranch either. On a trip to the area north of ranch headquarters to look for potential nesting sites, several broods were seen in the large east-west ditch about 1/4 mile south of the