Fulica americana 4/21 Ivel Lake, Contra Costa Co, Calif- first time today - then R/B joins G/S and they both show some alarm as they move back to H4 and up the inlet. B with 1 dh-hd upp feeding at E5 is the obvious cause for the immatures' sudden departure - but where are the rest of the imm, 3:16-22 for 3 of the 4 yng have been seen today- only the smallest has not appeared. I noticed today the tendency of these birds to follow paths already made thru the pondweed-rather than making new ones - this seems not to apply to the yng tho. The area cleared where the swing net was has been a favored area for transit and feeding since its net was removed, 3:33 B cut across from F8 to F4-scattering G/S into H4 and R/B and P/S into E4- but not satisfied. B went in after the last two imm- and a moment later P/S came flying out - from E4 to B10 while B in pursuit landed at F8, 3:37 G/S & R/B are both feeding at G+H4- B w/1 bl hd & 1 wh hd yng is feeding at G8. - I wonder if the bird that has been