I was recently reminded by Colin of an incident last year when he played a great shot into the green on the 10th (his words); a crow then picked up his ball in its beak and flew off with it some 10 or 20 metres before dropping it off the green. Apparently this is not uncommon, the birds can mistake the balls for eggs: click
HERE to read more. If it happens a lot the advice is to use non white balls. I would add: don't eat your spam sandwiches and then handle the ball, 'cos they go berserk for spam.
