Mayhew 1952 Mallard 39. May 23 Gray Lodge Refuge, Sutter Co., Calif. The cover varied from 18 inches to 6 feet in height, and consisted of mustard, tules, & pigweed. Water was across the road about 50 feet away. There was lots of down in the nest. Temp. - 34°C, R.H. - 43%. (Readings taken at 10 A.M.) Nest 26 — The ♀ was flushed from a nest containing 5 eggs. There was lots of down in the nest. When the nest was first found, there had been 8 eggs in it, but 3 were now missing. 1 broken shell was found about 2 feet from the nest. Water was about 100 yards away. The cover was about 12 inches high around the nest. Temp. - 34°C, R.H. - 39%. Nest 8 — The ♀ was flushed upon my arrival at the nest, which contained 9 eggs. There was lots of down in the nest, which was packed around the hygrometer when the readings were taken. Clover cover was about 24 inches high. Water was about 10 feet away. Temp. - 36°C., R.H. - 40%. Nest 17 — The ♀ flushed at my arrival from 5 eggs. There was lots of down in the nest, which was used to seal in the hygrometer (whenever enough down was present, this was done). Water was about 50 yards away. The cover