Nature's Way Bird Products BWH3 Bamboo Bluebird Box House Crafted with Solid Cross-Ply Bamboo - 5 X Harder and Stronger than Cedar or Cypress Wood Air Vents Allow for Maximum Air Ventilation Through Wall and Floor Openings Clean-Out Doors Provide Easy Access for Cleaning Predator Guard Extends the Entrance Hole to Protect young Birds Against Predators Pole Mount or Flush Mount Installation Options