Answer: Your woodpecker is called a sapsucker--this clever bird doesn't actually eat the sap--he drills holes in the bark so the sap will run out and attract the insects that make up his diet. Other creatures will also partake after he is done. Hummingbirds, bees, flies and other insects, even bats! <br><br>A few holes shouldn't hurt your tree; however, the holes can invite disease organisms. A good way to deter birds is to hang something to scare them. Scare-eye baloons, strips of mylar, even a pie panon a string will all frighten the birds, at least for a time. You can also try fake owls and snakes. You may need to change the deterrents as the bird becomes used to them.
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