Well, we got our tree (real) up this past week, we have talked about how to safeguard it from the birds for months prior. Happy to say it's been left alone completely (so far) but only the GW's have really had access to it at any time. The GW's rarely leave the cage area unless they're looking for one of us, the Zon's always come into the office as does the Hahn's. My biggest concern is the fertilizer in the tree stand.