Quote:
Originally Posted by Hillcountry
They don’t necessarily peck at things that harbor food...
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Correct
Although woodpeckers can sing like other birds they often communicate with each other by "Drumming" usually to claim territory or to (find / attract) a mate.
Have had lots of problems with them over the years. An inexpensive way to temporarily discourage them from visiting is to hang a reflective mylar tape or strip where they like to visit. The slightest breeze will move it around and make them uncomfortable. However it looks a little odd hanging off the side of your home. Short pieces of monofilament fishing line is also said to work.
Other suggestions
http://www.sialis.org/drumming.htm