Bird Chorus is like a game of add-on, which will test both your visual and aural memory. The chorus of birds look harmless enough, but every screen you enter they are mixed up and not in the same order they were before. The first turn you take one bird will sing, and you'll click on that bird to move on. Then the screen changes and the first bird sings, and a second joins in. Click on those two, and then the screen changes again and suddenly you have three birds, then four, and you'll keep going until you forget the order. Or maybe you won't forget? See how far you can go before you make a mistake in Bird Chorus!