Great; but not so great. – Audubon Bird Guide Review

For sure, this app is worth having, but it is equally frustrating. I enter all the items to identify any bird, even a crow, and it finds zero results. I enter my sighting with a photo, and it gives me no information or means by which to size the photo to suit this app. So, I get a photo showing about one fifth of a bird. However, the info on a bird, once I find it, is excellent. One useful feature to add would be that a description includes a short list like, “Often Confused With ...” or “Similar To ...” or “See also ...”
Review by CD Wyte on Audubon Bird Guide.