This is how creatures "look" in Dwarf Fortress to the game itself, since they're only programmed to have parts; but there is nothing that distinguishes where the parts actually... Are?

Someone made a mod that visually represents every monster in the game the way the program is connecting the parts together and it's pretty fucking funny. It's also how you can do absurb things like biting something's foot while you're stuck in a headlock in their armpit.