>>37626
To be honest, I have no idea. Flying humanoids in general are some of the most mysterious creatures I've read about. There seems to be no natural, rational explanation for them. From an evolutionary and biological standpoint, they shouldn't exist. Which leaves us with paranormal theories, but as you probably know, once we leave the safe harbour of orthodox science, we're flying in the dark. The truth is, we don't really know anything for sure about most of the subjects we talk about on /x/. There's only speculation and imagination because there is no way to verify a hypothesis.
Take Mothman for example. Some people think he's an alien, or a demon, or the result of a secret genetic experiment, or a physical manifestation of some almighty cosmic trickster. We lack even a proper philosophical, scientific or spiritual framework to explain these strange phenomena.