As cities grow, their populations become more diverse — on a species level. As we move into the future, many wild animals will be living in urban areas alongside humans and their pets. Now, urban planners are figuring out new ways to make urban species diversity possible — without killing anyone.
"will be living"? I've read that coyotes (or some other canines, I forget) have figured out how traffic lights control their chances of being run over. And (from some TV I've watched), urban areas are creating a sub-species of super intelligent, street-smart raccoons.