Cities are growing at a faster rate than any other habitat on Earth. They may seem an unlikely place for animals to thrive, but for the bold this is a world of surprising opportunity. Leopards prowl the streets of Mumbai, peregrine falcons hunt amongst New York’s skyscrapers and a million starlings perform spectacular aerial dances over Rome. We welcome some creatures into our cities; in Jodhpur langurs are revered as religious deities and in Harar locals live in harmony with wild hyenas. Many animals, however, are struggling to cope in the urban jungle. As the architects of this environment will we choose to build cities that create a home for both us and for wildlife?