How to Build a Wren Bird House out of Grapevines

Cut strips of grapevines away from the plant. The length of the strip varies by project, but 4 to 6 feet is generally a good starting point.

Remove the leaves from the vine. You can leave vine tendrils, or offshoot vines, to add a rustic appeal to your birdhouse.

Dry the grapevines in the sun until hardened. Depending on the amount of sunshine available, drying the vines could take up to two or three weeks. The vines will shrink as they dry.

Soak the dried grapevines in a tub of water for several hours, or until malleable. The vines are dried and then rehydrated to prevent the finished project from shrinking.

Cut an entrance hole in the center of one side of the cardboard box. The hole should be between 1 inch and 1.25 inches in diameter. Wrens are small birds, and an entrance hole that is too large will dissuade them from nesting in your birdhouse. The cardboard box itself should be about 8 inches in length, height and width.

Weave the soaked grapevines around the cardboard box, using any pattern you desire. Cover the entire box, except for the entrance hole.

Allow your birdhouse to dry until the grapevines are hard once more. You may choose to add a second or third layer of grapevines by repeating steps 6 and 7.

Remove the cardboard box from the birdhouse. If you wet the cardboard first, it's fairly easy to pull out of the birdhouse with a pair of tongs. The cardboard absorbs water more quickly than the dried grapevines and will generally disintegrate before the grapevines begin to lose their shape.

Cut a piece of twine, grapevine or craft wire about 8 inches long. Turn the birdhouse on its edge so it is diamond-shaped. Be sure the entrance hole is on one of the vertical sides. Stick one end of the wire through the peak of the birdhouse. Form a loop out of the other end of the wire and tighten the loop joint with a pair of pliers. Attach a cord to the loop to hang your birdhouse.