The main "wonder" is what kind of drugs the author/illustrator was taking.
This is a very disturbing book on many levels. It's not "bad" disturbing; it's just "creepy" disturbing. It's not, like, "keep away from children at any cost" disturbing. I really don't have much else to say about this except how profoundly disturbing this book is.
Message
Birds are cool, and they're in danger of going extinct?