Attract bluebirds and other feathered friends to your garden with this durable birdhouse of sustainably harvested, solid mahogany. This avian homestead is guaranteed for 10 years and will weather to an attractive silver-gray. A predator guard surrounds the 1 1/2-inch opening and also keeps out squirrels and larger birds. Measures 14 3/4 inches tall, 7 1/2 inches deep, 6 inches wide. The front panel lifts for easy cleaning. Bluebirds often face competition from swallows, so it's recommended that you space a pair of birdhouses 5-15 feet apart as this will ensure that one of the houses is available. Swallows will not nest that closely to one another.