I buy hanging baskets in the spring and when they are empty I used to put them in the wood shed which is open on the east side. One spring I noticed bird activity in that area and went out to check. In over a twenty plastic pots hanging on nails against the wall birds had built their nests. It was a small bird city. We, and many visitors, were entertained with the flights in and out and the constant bird chatter. Unfortunately, that fall a neighbor moved in across the street who keeps cats. I took the plastic pots out that winter so I would not be providing a feast for the cats come spring.