Benefits of a Green Roof - Providing a Habitat for Small Animals
If a green roof provides significant amounts of water, shelter, and food, it can become a habitat for birds and butterflies.
Having a green roof could help satisfy local minimum parkland or green space requirements.
Your green roof can be built to replace a habitat that was destroyed during construction of new buildings in your city or can be built to mimic an endangered ecosystem.
If your green roof is inaccessible to the public, it can provide a better habitat than a garden at street level. Insects and birds that nest on the ground are less likely to be disturbed, and plants are less likely to be stepped on.