"If you don't know what a gryphon is, look at the picture."
— Lewis Carroll, Alice's Adventures in Wonderland
The griffin is a most luxurious-looking creature with the body of a lion and the head of an eagle.
And let us not forget the two glorious wings! Its victims surely remember such important details.
Now, if you're paying close attention at home, you'll notice that lions are real. Eagles are real, too.
Heads and wings? Those, too. So is it possible the griffin was once real?
WARNING: The griffin is not to be confused with the hippogriff. Don't know what a hippogriff is? Then it's obviously time for you to return to Gryffindor! Promptly re-read Harry Potter Books #3 through #6. And possibly #7.