Quetzalcoatl Feathered Serpent Heads
One side is the head of a bird / Opposite side is the head of a snake
Quetzalcoatl is a deity in Meso-American culture and literature whose name comes from the Nahuatl language:
quetzalli, meaning “tail feather of the quetzal bird [Pharomachrus mocinno],” and coatl, meaning “snake”.
It is one of the major deities of the ancient Mexican pantheon, symbolizing change and transformation.