Cornell’s Merlin Bird ID app has just added a new feature - Sound ID. Just start the app, and it’ll pick up bird calls it hears, and tell you what birds you’re hearing. It’s absolutely uncanny. We’ve been using it for a week or so, and it’s very accurate. They’ve also just added a feature where you take a picture of the bird and it’ll tell you what kind of bird it is.
It’s a freebie app from Cornell U. Once you download the basic app, you need to download a geographic “pack” for birds in your area, or you can just download all North America.
The basic bird ID app was already excellent, but the addition of the picture feature and especially the sound ID knock it out of the park.