Tulica Americana 326 Lake T gumeral, 420 ft., Alameda Co., Calif. Nearby at G21. The ♂ shows no inclination to leave this area so long as I remain nearby. The ♀ of this pair is noticeably smaller than the ♂. As I started to leave the area, the ♂ called her off the nest, and both swam abreast no far a way. Both have large shields, but hers is smaller. Hers seems more rounded at the bottom his more square, but I don't think I could separate them on that character. She returned to the nest after a short absence. Although the platform at P16, 2 is completely defunct, when I waded out to it the ♂ responded immediately, by puking and moving down this area, then maintaining patrol off shore while I stand here writing this note. Both birds of the E pair have bright yellow legs. Among the M pair at least UNM has yellow leg, whether ♀ does or not I am not sure. The local population seems much reduced now. Thus far this morning I have been able to account for the SW, SE, M and E pairs, plus W/BL and 2 or 3 on the NW side of the lake. The N pair seems to be gone and I have not definitely accounted for the W pair this morning. Just now 10:00 am., SE bird ♂? chased both M birds from L9.2 to X11. MO made no reply but M♀ cawed, SE ♂ went back home.