ZIEGLER 1950 LESSER SCUPA (AYTHYA AFFINIS) FEB 18 LAKE MCERITT, OAKLAND, ALAMEDA CO., CALIF. 9:10 AM - SINGLE BIRD SEEN (30' FROM SHORE FINALLY) YELLOWISH OR WHITISH EYE NOTICABLE. SEEMED TO KEEP HEAD LOWER THAN MARRKOS - MORE "COMPACT" & CLOSER to WATER, BLuish BILL & RATHER FLUSLY WHITE SIDES (CUT OFF SHARPLY AT BLACK OF BREAST). THIS BIRD SEEN DIVING NEAR SHORE. STAYED UNDER 7OR 8 SECONDS & CAME UP NEAR SAME SPOT. 9:30 NOW 4 O'S CLOSE TO SHORE & DIVING. WHEN DIVING SOMETIMES HEAD IS LOWERED & DUCK SIMPLY GIVES A THRUST OF FEET & GOES UNDER. OTHER TIMES SLIGHT "JUMP" GIVEN FORWARD ALMOST ABOVE SURFACE OF WATER AS DUCK GOES UNDER.