HI Burt:
American Wigeons are kleptoparasites of diving ducks and of geese/swans.
They steal food that the other birds bring up to the surface, food that
the wigeon can't normally reach!

Ian Paulsen
Bainbridge Island, WA, USA
ipaulsen at krl.org
A.K.A.: "Birdbooker"
"Rallidae all the way"