Merlin is a Free, Instant Bird ID Help for 285 North American birds.
The Cornell Lab of Ornithology has created this new iPhone/iPad app to help beginning and intermediate bird watchers identify birds.
You can download the free Merlin app from the App Store on iOS7 devices. You will need a wi-fi connection to download the app because of its size.
They’re working on Android and web versions that will be ready later this year.  To watch a video and learn more about the app, please visit the Merlin App website.