Someone wrote to me this week asking for ideas on woodpecker control: How to keep them from pounding holes in the siding on your house. Google brings many ideas to the fore. Try "woodpecker deterrent."
The best solution for my money, though, is the attack spider. Go to http://www.attackspider.com/
I bought one some time ago. It’s a hoot. It has to be effective. It even makes a good gift, depending on the age of the recipient. I gave mine to my grandchildren.