This bird house is modeled after a wrens ideal home. Wrens aren't picky about their homes and will nest in small, plain houses. Just make sure the entry holes measure about 1 inch in diameter to let the wrens in and keep predators out.These amazingly detailed DIY models start as 4" square steel sheets and finish as amazing 3D models. Use easy to follow instructions to pop out the pieces, bend the tabs, and connect them at the attachment points. Build your collection today!