We've had an ongoing battle of wills and superior intelligence with the bulbuls and mynahs and we still don't know who is winning. The bulbuls are birds that keep eating all, and I mean ALL the blossoms off the lemon tree and the baby buds off my mother's prized orchid plants. I don't know where we got the idea but we decided to hang up used data disks and so far the sparkling, moving disks seem to keep the birds away.
We were feeling downright clever, but was surprised to see these disks in Miyajima, Japan when we were traveling there last month.
I'm not sure how long these disks will work before the birds figure out they've been had. Being called a bird brain isn't necessarily an insult as far as I'm concerned because it's really hard to get the better of these bird brains.