Use a mailbox as a decorative birdhouse! Find a suitable mailbox and paint or decorate it. Drill a hole in either end of the top of the mailbox and insert an eye bolt to hang the mailbox birdhouse with chains or rope. Open the door and attach a cabinet drawer pull to either side for a perch porch. Place a wood block securely in the space between the door and mailbox and fill the door with birdseed. Hang the mailbox in your yard and place a collection of strings in the area for the birds to make their nest.