This popular house comes standard with a slate predator guard to keep squirrels from enlarging the entrance hole. Only a few varieties of woodpeckers live in man-made boxes, but the Hairy Woodpecker, Red-headed Woodpecker and the Red-bellied Woodpecker regularly do so. And they all use the same size house. This house comes with a bag of wood chips as woodpeckers usually leave wood chips in the homes they excavate for themselves. As with all our nest boxes, the design includes appropriate ventilation, drainage and opens for easy clean-out. Sustainably grown 1" thick Eastern White Pine provides superior insullation. Hand crafted with pride in Maine. Repair or replacement of any defects in manufacturing or materials upon return of any defective item to Coveside Conservation Products.