Have your squirrels decided to expand the hole size on your bird house and move in themselves? Metal portal protectors prevent unwanted birds or other animals from enlarging the entrance holes on your bird houses. Or they can be placed over an already expanded hole to correct the opening size.
There are three sizes available at the Wild Birds Unlimited East Lansing, MI store. You can choose the 1½ inch opening to allow bluebirds, swallows, Carolina Wren or sparrows access or choose the 1¼ inchto allow access to only the smaller birds like titmice or chickadees. And the 1 1/8 inch portal protector only allows in the tiny House Wrens.
The metal portal protector rings have 2 holes pre-drilled and 2 screws included for easy attachment. It does not deter birds from entering.
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