To know if your ghost is a starling use the starling test which is where you put your index finger down with your thumb slightly curved. You have to ask them to put a number in their name. It cannot be zero Due to the fact that zero looks like the letter O. If they don't do any of this, they are considered a starling. If you see a PNG that is moving or the moon has change that is a starling and if you do see that you will use the starling Classification on GOC