Birdhouse Centerpieces?

Birdhouses seem to come in every size, shape, and theme known to man.  At a lovely garden wedding last spring, the reception was held outdoors and the theme was rustic-but so very elegant.  Not too sure exactly how they pulled this off, managing to incorporate all the decor that was just beautiful.

A decorative birdhouse adorned each table as the centerpiece. They were rutic looking, but real houses meant for the outdoors.  One person from each table got to take one home.  What a great idea  I thought, instead of throwing away the centerpiece, these could actually be used to house the birds!