Green roofs give you all sorts of opportunities to play around and experiment with nature on your building. We've wanted to add bat boxes to our Sun Alta green roof for a while. If you're thinking about doing this yourself, now is the time to get started. Aim to have your bat box up before early May when bats come out of hibernation and return to their roosts. The popular view of bats as pests might have you cringing at the thought of having bats in your backyard. They don't