Fulica americana 4/75 June 4 Jewel Lake 510 ft., Contra Costa Co., Calif. heads and necks. Body plumless. 9:33 a.m. one parent, fledgling came out of IS with an alternate charge and brace, his mate was at & 4 flying at H4. I suggest platform activity in there. Will have to check that, and the Mallard nest. There are definitely four young and there may be 5. There is one completely lacking the halo, (the largest) one with a very indistinct halo, and two with distinct halos, one darker than the other. This largest bird has its throat mostly dark the back of its neck quite as. Of the two adults on the lake, one has the square bottomed indefinite edged shield, [illegible] while the other has a pointed shield with a definite edge. Couldn't get a note from either or see which one is banded. One young is white throated with a lighter band extending around the back of the head, it has a dark halo and a dark & band up the back of the neck. This the young are all fleeing pretty independently of their parents. They respond quickly to any warning call of the parent. A couple of "pukkas" by the ? and any that are out on open water take for cover while those on the edge of cover freeze in place.