A type I survivorship curve is a , and shows individuals that survive from childhood to adulthood. The greatest number of deaths occurs during old age. An example of a type I curve is seen in .

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.