Wouldn't it be great to have a batter-fly in your yard to collect guano? I mean, only for bog-houses, but that would be awesome instead of teleporting/walking all the way to the mines.
I think batterflies in the bog homes is very appropriate. Buterflies would have to be banished though, but the trade-off works. I don't have a bog home, but have been lusting after one. Batterflies would make it even more tempting.