It was found on the shore of the Ohio River in Kentucky. It is very hard, like bone, and feels hollow but does not rattle. It is translucent. I do not think it is skull of a water fowl even though the blunt end appears beak-like. I cannot figure out if it is plant or animal. It was found in an area where arrowheads were found.
It appears to be hollow. I do not believe it is a shell since there is no margin or growth lines. It appears to be shriveled or desiccated.