There is some speculation that the serpent of Genesis had wings as well as legs. That serpent represents Satan, or the spirit of Satan, whatever, who himself is represented by a dragon in Revelation, which is a winged serpent in mythology. Or a worm in some cases, which is similar. And then there’s the pagan god of meso-America known as Kukulkan, a winged feathered serpent, who often demanded human sacrifice. Were something similar to dragons around sometime in the prehistoric past? The mythos of them is pretty much universal, and not just limited to a single region or culture.
Interesting and apparently something we will never get solved on Earth.