Source: Winnebago legend
In the old days people were not the chiefs and did not hunt animals. Animals were the chiefs and hunted people.
The animals killed all the people except one girl and her little brother.
Source: Winnebago Oral Legend
The twins traveled all over the world and killed all the evil spirits they encountered.
Then the twins went under the earth, under the rivers, under the ocean and then above the earth, visiting the Night spirits, the Sun, the Moon, the Stars, the Thunderbirds–all of them.