This slot entrance bluebird house is designed to deter sparrows. Research shows that bluebirds prefer a slot entrance over the standard circular hole while sparrows prefer the opposite. In addition, sparrows don't like a shallow box and bluebirds don't seem to mind. This box is only 5" deep. In the unlikely event that sparrows continue to pose a problem, a wooden insert is included to reduce the depth further to 3.5". Sparrows rarely use that depth, but bluebirds will still occupy it.
Product Size: 10" (h) x 6" (w) x 8.5" (d)
Allow 2 weeks for delivery.