Warblr can identify that bird just by hearing its song - http://www.engadget.com/2014...
"Technology can be pretty wonderful sometimes. Case in point: Warblr, an app that uses sound recognition tech and your phone's GPS signal to identify birdsongs. The application first pinpoints where you are (it'll debut in the United Kingdom), and narrows the results by what types of fowl are common to the area, according to its Kickstarter page. Then, after making the ID, it presents the most likely suspects." - Amit Patel