This video shows you how to get the papaya that is hidden in Angry Birds Rio Carnival Upheaval Level 20 (8-5). Be prepared for some some frustration, as this is the hardest papaya to get. The labeled crate is extremely well protected at the bottom center of the level. Below are two strategies, both courtesy of AMslimfordy.
Hard – Blu is the key to this strategy. Fire Blu at the highest structure (the one overlooking the TNT field). You need a little luck as Blu must do two things. First, he must roll backwards and pop the marmoset blocking the gap leading down to the labeled crate. Second, he must nudge the top (slightly thicker) stone block at the top of the gap so that the white bird’s egg bomb can penetrate far enough. You can then waste the Red Bird.
Harder – Fire Blu very high vertically and try to make him land right above the labeled crate. His conniption fit should clear quite a bit of debris. With a bit of luck, there should be a gap leading straight down to the crate (luck is a key word here as a stone block typically blocks the path to the crate). Waste the Red Bird and use the White Bird to drop a bomb down that shute. If you’ve got another strategy feel to leave a comment.