Quetzalcóatl, the great Feathered Serpent, descends into the underworld to retrieve the bones of the previous generation. He is nearly defeated and trapped by a quail, a minion of Mictlantecuhtl, the Lord of the Dead – but Quetzalcóatl is a wise, crafty god, and escapes. He makes humans from these bones, and because a few of them broke in His escape, that’s why humans come in different sizes, they say.
Now, none of the mythology said it was a giant undeadquail, but I took some artistic liberties. Prints available here.