On the galápagos islands, darwin observes tortoises with domed and saddle-shaped shells. how did darwin’s observations of these tortoises with form the theory of evolution by natural selection?

fumikage isn't really a bird, and tsuyu does have teeth. tsuyu has a transformation quirk which still allows her to be partially human. otherwise we'd have a large frog running around. fumikage has teeth because again, he isn't a bird. his head was a quirk mixture if i'm correct.