Heh, try again Ninja Merowger.
Last I checked, a mastered form of martial arts, nor a lifestyle, counted them as being creatures.
Though in a sense, Humans are creatures...
I would have thought this being in the Monstrous Animals section would have made it clear enough...
But it didn't, so let me narrow this down.
When I say "Creature" I mean, Bug, Furball, Bird, Squid, Fish, Mammals, Arachnids, etc etc etc. Many different things to throw out there...
I hope this made it a little easier.