[Lauchenoiria]

There is meant to be many, many species of butterfly in Lauchenoiria, mostly on Butterfly Island (as it is aptly named). I'm not sure how best to explain why there is so many different kinds of butterfly. Lauchenoiria chose it as their national animal due to the abundance of them across the country.

During the unification of the various provinces, there was this expectation that the larger state would be more successful and those trying to encourage unification would tell the more sceptical that the unified Lauchenoirian state would be able to "soar like a butterfly" together rather than struggling apart. So partly nature, partly propaganda (though most Lauchenoirians would be offended if someone mentioned the latter).

Aeluria, the other island, is meant to have a large amount of trees, the local religion considers one species (haven't decided which one yet, but it should be fairly common across the island) to be symbols of the divine and people are not allowed to chop them down. Therefore the Aelurian wildlife will be mainly forest dwelling creatures. There is not much agriculture on Aeluria either, the native population remained hunter-gatherers for much longer than in other parts of the country, and when the island was settled by others they mainly imported farm produce.