Don't know how big your trees are but is netting an option? Another thing I've heard (but don't know if it works) is hanging alu foil pie plates in the trees. The reflection and movement is supposed to scare the birds away.
It may seem difficult at first, but everything is difficult at first.
Laughing 100 times is the equivalent to 10 minutes on the rowing machine or 15 minutes on an exercise bike!
| December Minutes: 505