ASPEN SONG SPARROW-RESISTANT BLUEBIRD BOX/HOUSE (FOR PICK UP ONLY)

House Sparrow-Resistant DesignYour goal is to provide a safe environment for Bluebirds to breed and take measures to prevent House Sparrows from taking over and breeding in your nest boxes. House sparrows love to build a bulky nest over top of their nest and entrance. This compact house does not give them room enough to do so.Slot Design Helps Protect BluebirdsThe enlongated, narrow slot (1½” x 3½”) provides an escape route for Bluebirds and Tree Swal­lows if attacked by House Sparrows. The intruder can’t block the slot as easily as a small, round hole, and allows the birds to exit to safety. Thus it saves many adult birds' lives.Interior Angled Block Minimizes Room In The DwellingThis angled wood block simply takes up extra cubic area within the nestbox that Sparrows would desire, but Bluebirds and Swallows don’t need. The intruder then sees there is not room enough for him to nest, so he usually leaves the young Bluebirds and Tree Swallows alone.Pull-Out TrayThe feature of a removabl