Everyone I ask thinks I should put birds in my birdhouses. But I already have bats in my belfry and I have already put birds in my other birdhouse rockets. For the HoJo, I plugged it with a large emerald colored lens. The Raygun Gothic Birdhouse has a Creeple Peeple pilot behind a clear window. The only suitable plastic that I had isn't really that clear, but it is easy to replace later.