Angry Birds Hints for Android
Take out the slingshot when you can use the big red bird and when it is in the air tap the screen and it will make a sound.
The best way to use the Green bird is to launch it backwards and tap the screen before it leaves your view. Doing this will make it fly just like the other birds.
Different birds are better for different materials. For example, blue birds for glass, yellow birds for wood and black birds for rock.