Audubon Ent. Bird Guardian Bird House Protector, Screw-on

The Bird Guardian Birdhouse Protector. Audubon Entities Bird Guardian Birdhouse Protector is patented, tested and approved one- of-a-kind product that protects eggs, baby birds and even the adult bird in the birdhouse from harm. 6.00 inches tall x 4.75 inches long x 3.00 inches wide