Mad R. ford, 2700 ft., above Ruth, Trinity Co., Calif. May 26, 1933 Arose early after Bekle's example.-5:00 AM. Last rite was clear and cold up to 3:00 or 4:00 AM; then at a heavy fog settled in the valley and the damp cold was much more piercing than the cold before. Took in all my traps. Enroute along Littlefield Creek, 200 yds. from mouth I found nesting hole of Chestnut sided Chickadee. Hole was on north side of 25' pine stump 3-4' in diameter and was about 18' from ground. Pair was were observed in vicinity on way up creek, and on way down one of the two birds was seen to fly to the hole, disappear within and emerge age about 5 seconds later. And bat hunt this evening in which only Hoary Bats were taken.