Quetzalcoatl

Quetzalcoatl was a feathered-serpent deity worshiped by the Toltec on Earth.

In 2270, Captain Kirk and the USS Enterprise (NCC-1701) encountered Kukulkan, an alien being who had visited Earth in the ancient past. Kirk surmised that the legend of Kukulkan was the source of the Toltec worship of Quetzalcoatl.