The Native American Demon Piasa, or is it the Babylonian Demon Pazuzu?

Native Americans have a legend of a red-eyed, dog-faced demon that once roamed the Ohio Valley called Piasu. To Illinois, Piasu meant  "The Bird That Devours Men."  What was the origin of this demon?  Native Americans along the Ohio Valley also have legends of an ancient giant race.  In "The Nephilim Chronicles: Fallen Angels in the Ohio Valley" is evidence that these giants originated in the ancient Biblical lands and were the accounted giants in the Bible known as the Amorites. The Amorites controlled Babylon from 2000 B.C.- 1600 B.C.  In Babylon was ancient demon that was very similar to Piaus, having red eyes, dog-faced and winged; it's name was Pazuzu.  

The demon Pazuzu was the origin of the possession in the movie "The Exorcist." Is this what was roaming the Ohio Valley?