How flutterbys came by their peculiar name, since they look nothing like butter? Yes, I think someone did . . .
So I performed a little bit of history channeling and it seems the most reasonable hypothesis is that Hamlet, as a very young lad, flipped the f-b sounds as he was learning their name. His parents were so enamoured by the witty charms of even Hamlet's slightest stumble, that in this case word spread far and wide . . .
and thus flutterbys came to be known as butterflies