Songbird Essentials adds color & whimsy to any garden with our beautifully detailed wooden birdhouses that come ready to hang under the canopy of your trees. Hand-carved from albesia wood, a renewable resource, each birdhouse is hand painted with non-toxic paints and coated with polyurethane to protect them from the elements. By using all natural and nontoxic components Songbird Essentials has created a safe environment complete with clean-out for our feathered friends. We have included hangtags featuring our green source & product care. Entrance hole is 1.125 inches.