This is a big problem! Our Senegal has developed a screeching habit outside of normal morning and evening stuff. He lives in a large cage with our African grey. At first it was when someone went outside or came into the house, now he will do it all day long! We have tried a variety of things, like keeping his toys changed, covering the window in case he was calling to things he saw outside. - we try hard to ignore it but every now and again it gets to be too much and we have put him in a cage in another room. We have since learned that this can actually reinforce his behaviour - so back to square one. What would you do? we are at wits end.