Someone wrote in about drunken robins. I have a similar story about another species of birds. I have a large firethorn (pyracantha) in my front yard. It has bright red berries that ripen in the late Fall. Apparently they too turn 'alcoholic' when overripe. One year a couple of years ago, a flock of cedar waxwings came by and continuously ate berries for about 45 minutes, returning repeatedly. Many reeled from branch to branch and crashed into things, drunk as robins! Hilarious to watch!
Suddenly they were gone as mysteriously as they came. Don't know whether they saw the bright red berries or were attracted by the smell of the overripe berries (which I couldn't smell at all).