This Onyx Feathered Serpent God Whistle is a unique piece of Mexican pottery that is based on an ancient Aztec design.
It is designed to make a haunting sound and was often found in Aztec graves, even clenched in the deceased's hands. The whistle is made of black onyx and is a replica of a stone carving of Quetzalcoatl in the National Museum of Anthropology in Mexico City.
When blown hard…