On myth busters you could cover two adjacent small backyard ponds a with mesh enclosure over both, each with one type of fish in them or one with no fish at all. For an experiment you could use any small egg laying fish. Keep some pet ducks in there and see if they transfer any eggs. Remember, freak accidents happen and not all species of fish give such special care. We are talking about if it has ever happened over all of the millions of fish in ponds and creeks. I've seen a bird drop a fish that was too big for him. If his flight path was right it easily would have been restocked in the two ponds I'm talking about so over all of the years and ponds and birds out there I'd venture to say it has atleast happened once in some species of fish with a bird somewhere. That's cool that you tried to stick eggs to a dead ducks foot:)That's science in the field right there!!!