These powder-coated, steel birdhouse opening protectors prevent starlings, woodpeckers or squirrels from enlarging the entrance to nest boxes. The Bluebird entrance hole diameter is 1.5 inches, the Nuthatch portal protector opening is 1.25 (1 1/4″) inches, the Chickadee portal opening is 1.125 (1 1/8″) inches, and the Wren portal opening is 1 inch. The outer dimensions of all are 2″x 2″. Each comes with 4 small screws for easy attachment. The Bluebird house size is also available in attractive solid copper. Note: As a small-order handling fee, Orders of 1-3 portal protectors may ship by 1st class mail at the priority mail price. Made in the USA.
