Swan mask of the Yup'ik. According to Jacobsen, this shaman mask from the mouth of the Kuskokwim was used at the last festival of winter. The face represents the auxiliary spirit of the shaman who is supposed to bring the swans, geese, ducks and other birds to the coast in spring to serve as food. The mask was in a wretched state after its return from Leipzig and had to be painstakingly restored. Compared to its original state, the ruff made of caribou fur is missing.