We find attaching lengths of holographic scare tape to the top or on the windows to blow in the breezes helps a lot. Lengths about 12 to 18 inches long. It can be found at some of the bird stores and Lee Valley www.leevalley.com in the gardening section I think. 100 foot roll for about $9 Canadian. It is used to deter birds from eating fruit on trees and bushes.

Gerrie Patterson
Gibsons,B.C.

birdsabundant at sunshine.net