Ho-Chunk mythology
The Ho-Chunk are a tribe of Native Americans, also called "Winnebago".
Kokopelli is a god worshipped in many tribes. He is a humpbacked flutist. Among the Winnebago, he has a penis which he detached and placed in a river in order to have sex with the girls who bathed in the river.
Arrival
A Menominee chief saw a vision on the beach of Lake Michigan. A huge flock of ravens flew past him, shining brightly with color, unlike ordinary ravens. One landed and turned into a naked man. The chief ordered his people to give him clothing, for he deduced that he was a great chieftain. The rest of the ravens also turned into people and became the Winnebago.
See also: Native American mythology