i have watched the scene in the wizard of oz where people say you can see what looks like someone hanging themselve in the background.i think it is a large bird and when i watched it in zoom i doubt if it is anything other than a large bird.

I think it was a large bird hanging itself

I know, it's a load of hooey. In fact, most Hollywood urban legends have no basis in truth, except one... C.H.U.D.s

snopes will be your best friend.
http://www.snopes.com/movies/films/ozsuicid.htm