Points Requied for 3 Stars - 83,000
There are two cages stacked on the left side with a yellow bird in top cage and blue bird in bottom cage. Below the cages are two square blocks with a space in between them. aim slightly above the two blocks and if you're lucky you can take out everything.
Alternate 2 bird method: Aim for the vertical piece of wood just above the yellow bird on the front bottom. Boost your yellow bird before impact. This should take out the first half of the structure. Use your second yellow bird to knock loose the ball in the back by breaking the box beneath it. This should destroy any remaining cages and get some extra damage.
Birds Required: 1