This really is a great picture! I'm so glad to have unearthed this! Don't worry, we don't really know either. It is kind of funny how the father obviously knows more about this than you do. I appreciate how good the wing tips are. It looks like there's an octopus arm in there.
I love the mystery to this. You don't even know yourself! Everything is distorted in a good manner. You get a good emphasis on the right body parts. It's quite a chilling picture.