Birders hear more than they see, but songs can be hard to identify. If there?s a killer birding app on the horizon, it may be one that identifies a species based on the song. University of Wisconsin ornithologist Mark Berres is applying for a patent for an app he calls WeBird, which could be available next year. You?d record a snatch of bird song on your iPhone and use the app to compare the snippet with thousands of recordings in a database.