W. GULLION 1950 Fulica americana -439 May 19 Lake Tennesca, +20 ft., Alameda Co., Calif. 5:32 p.m. the SE ♀ started "punking" on the nest; the SE ♂ replied with "pukin" she came off the nest, met the ♂ at K6, they moved, she leading, to L5. She diving and cachling, he coughing. By 5:35 he was at the nest and by 5:36 settled up on it. The sun is just beginning to wane here. I shall leave now. In all, 15 Costs were accounted for on the lab today. May 20 same locality- At 3:40 a.m. a bird on J6.5 that I believe is the ♀. Clocked @22 at 3:45 a.m. No birds present. As I moved to Q22, a ♀ "punked" several times at the S end, but I could not tell where. There is already a good glow in the eastern sky. 3:56am a noisy, active Mallard ♀ got SW ♂ started "punking", and perhaps he chased her, at least she flew to the channel and got the MF calling. The SW ♂ replied, then the SE?♀. A WO ♂ called. 4:00 a.m. Robins calling and starting to sing. Buddies were displaying at 3:40 when I arrived. 4:13 a.m. a SE bird has ventured out from cover for a moment, still no light enough to see the lines on this page. It moved from beyond the nest to K6. A bird is still on the nest, no change. Was not able to see the shield. 4:30 a.m. The SE bird out too soon feeding at L4 - 4:35 back