Tim, i think it is clear to see that regardless of what the eyes are made of or the origin of this staff, it isn't really possible that it is "rubbish". It's a fine folk art staff no matter how you look at it.
I also think that with folk art we can't get too fussy over anatomical correctness. Part of what makes it folk art. I think that in all probability it was intended to be a snake, but nailing it down to the exact species from the carved features is not very likely. No real snake looks like this.
