Blackbirds (2 Viewers)

[David FG]

I find it interesting how bengalese finches will sit on the eggs or rear the chicks of other birds even when they don't have any eggs or chicks of their own. In fact, many say two cocks together make better foster parents than a pair or two hens. I know it's not as impressive as if birds in the wild done such a thing as bengalese were created in captivity, but still...

Yes, if you give a bird an egg or nestling, in the right circumstances it will hatch it or rear it - that is how cuckoos and other brood parasites work.

But that is not the same thing as a bird actively seeking out the eggs or young of other birds in order to hatch/raise them.