This dairy barn bird house is made especially for Swallows although there may be some Bluebirds and Wrens that might drop in for a visit. This unique birdhouse is made to be mounted on a building, tree or a pole. The house was made in the sytle of an old dairy barn. It is made of natural cedar. It has simulated boards, a coral with a fence, windows, front door, barn door, loft door, and a silo. This bird house has three drains and two air vents, 1/2" x 5" slot under each roof. It is insulated with 7/8" cedar. There is a raised nesting floor to prevent water from seeping in under the house into the nesting area. You can remove the three screws on the bottom in order to give it a complete spring cleaning. The roof peak seems to be the favorite spot for "daddy" to sit while guarding "mommy" while she is on the nest. Width 12.75" Nest Size 5" x 5" Depth 10.75" Hole Height 4" Height 14" Hole Size 1.5" Choose from the painted white barn or the all natural cedar by choosing from the drop down menu. These unique birdhouses are hand made per order. Please allow up to two weeks for delivery.