1-1/2" ENTRANCE HOLE SIZE: SISTERBIRD bluebird houses for outside have a properly-sized entrance hole, through this blue bird houses for outside you can attract desirable species to your bluebird house, such as Bluebird, Wren, Tree Swallow, Chickadees, etc. While this blue bird house excluding predators and unwanted occupants, for example, European starlings HIGH-QUALITY MATERIALS: SISTERBIRD birdhouse kits for kids and adults use untreated, unpainted cedar. bluebird nesting box has a rough surface, and birdhouses for outdoors can give birds a foothold as they enter and exit the cedar bluebird house. Cedar of birdhouses for outdoors clearance also can keep out weather-related damage SAFE HOME FOR FLEDGLINGS: SISTERBIRD Bluebird BirdHouse Box with copper predator guard around the entrance hole can help young birds against predators. These birdhouses for outdoors interior grooves, like a small ladder, help young birds leave the cedar bird houses for outside, especially swallows and bluebirds. A great birdhouses for outside clearance for creating a trail EASY AND FUN TO ASSEMBLE: Just use a screwdriver, you can experience the thrill of working with your family to build blue bird houses, and feel the pride that comes from building a bird nesting box for little birds. You can also DIY, paint it, making blue bird box special and unique, build your own blue bird houses for outdoors EASY TO CLEAN & REUSABLE: SISTERBIRD wooden bird houses front door opens for easy cleaning after fledglings have left. When the season is over, clean out the blue bird boxes for outside and save bluebird birdhouses for outdoors clearance for next spring