May 19 Lake Temescal, 420 ft., Alameda Co., Calif. boundary as it occurs outside the covers. 12:18 p.m. M♀ "punk-rubbing" at K7; then she gives a "punto" at three. 12:24 pm now the Mallard brood moves over towards the nest, and by it. No interest aggression because the SE ♀ was out L4. 12:36 p.m. M♀ foraging at L7, M♂ at L11; M♀ moved to N11 and back. W/BL moved out from N12 going W. No interest shown between G/R and either of other birds. W/BL is moving off N, away from G/R. Every so often the SE ♀ cuts across from L7.22 to K6. 7-♂ wonders if she has is coming out from a patrol against M♀. At this time, at 12:51, the "punk-rubbed" at K6 and was answered by several "puntos" by M♀, apparently from K7. ♀ 1:24 p.m. a dog wading in the cat-tails at the S end, H-L 5-6 caused SE ♂ to get off the nest & SE ♀ to move from L5 to nest area. Apparently no display was given. The dog was of the cat-tails by 1:25, now 1:27, SE ♀ is climbing on the nest end after careful preening she settled up on the nest. 1:30 pm. Two W birds seem to be in their area. 2 p.m. SE ♀ still on nest J6.5. 2:10 p.m. a momentary dispute at J7, apparently between SE ♂ and a ♂ Ruddy Duck. Following the trouble SE ♂ moved on to the