Finally - a birdhouse that gives nesting birds a clean, new environment every year! Our award-winning Nester pod was created with the guidance of ornithologists to provide a safe, climate-optimized enclosure for cavity-nesting bird species critical to both a healthy garden and broader ecology. Its innovative inner shell (100% natural wood pulp) can be easily replaced every year - avoiding the mildew, rot and pest issues that plague wood nesting boxes. .