I have just signed up for the course. I used to be into bird watching but I guess I let life and career get in the way. I have forgotten more than I remember. It seems some feral cats have invaded my neighbor and the birds seem to have disappeared a couple of weeks ago. I ordered a live trap, and I am going to try to catch them and take them to the humane society. The squirrels also vanished at the same time, and normally the yard is full of them.