Just a heads up the Audubon Birds app for Android has been updated/replaced and the new version doesn't work with Android versions older than 5.0. So if your device has Android 4.4 for example you can keep using the Audubon Birds app if you have it but don't remove it or you're SOL. Best I can tell it won't automatically remove it trying to update. Also the new version requires you to establish a username/password account but fortunately it DOES still have the option to download all data for offline field usage. The App name is now "Audubon Bird Guide".