There is a new citizen-science program called Abuzz. It's purpose is to track where and when various mosquito populations are active around the world using recordings of their calls with cell phones.
It sounds like an interesting project: Before You Swat That Mosquito, Record It on Your Cell Phone | Innovation | Smithsonian
It sounds like an interesting project: Before You Swat That Mosquito, Record It on Your Cell Phone | Innovation | Smithsonian