Some Nierans have the ability to take on the form of animals and walk among them. This great power is not known to all, and it is valued for the freedom and utility it gives a tribe.
The world is chaos, the land dangerous. Amear tribes are seperated by wide margins of terror, beasts, and harsh conditions. It is the Nieran skin changers who, with the ability to take the form of a falcon or owl, keep the culture unified and whole. Even over a millenia of isolation, every Amear knows that other tibes exist. They know they are not alone.
(note: The ability to change form is a class ability of the warder, a winterborn class).