I love the birds in my garden (and spend far too much time photographing them!), we have multiple bird feeders etc. However I would like to deter them from pilfering all the cherries off my cherry tree, or at least slow them down a bit! I’ve seen those hanging reflective discs, plastic spirals, and also people using old CDs…do they work? Which kind is best? And are there any attractive non-plasticky versions that would actually look nice in the tree?