Merlin Bird Photo ID is a piece of software, developed by Cornell University and Visipedia, that uses the latest computer vision technology to identify birds pictured in user-supplied photos.
To use the program, users start by uploading a photo that they might have snapped of a bird, drawing a box around the animal to help the software locate it. Then then click on the bird's eye, tail and bill to convey its orientation, and also specify when and where they saw it.
At that point, Merlin Bird Photo ID's artificial intelligence kicks in, comparing data points from the photo with tens of thousands of photos of known species of birds. The database currently includes 400 species of birds seen in North America, while the software itself can be used for free.