Cities are the fastest growing habitat on Earth but, for animals, life in the manmade world is not easy. Some are surprisingly successful - Leopards prowl the streets of Mumbai, Peregrine falcons hunt amongst New York's skyscrapers and 5 million starlings perform spectacular aerial dances over Rome. We welcome some creatures into our cities; In Jodhpur langurs are treated like gods and in Harar locals live in harmony with wild hyenas. Many creatures, however, are struggling to cope in the urban jungle. As the architects of our future will we choose to build cities that are home both for us and for wildlife?