Brettski, I don't really have an opinion on whether birds deliberately transfer fish, but I will say that the idea should not be scoffed at. If ants can transport leaves to nurture fungus gardens, I certainly think birds transferring fish is plausible. Nature has evolved some very complex behavioral schemes for survival. Transferring fish is a relatively very simple behavior. If it's proven some day, I won't be a bit surprised. That would make a very interesting doctoral thesis for a biology or zoology student.
