Our strategy for Angry Birds Birdday Party (Birthday Party) level 19-4 is to loft the Boomerang bird over the main structure, spinning it back into the triangular support in the bottom-right corner. Make sure the falling debris pops the the rightmost pig. Fire a Yellow bird straight ahead, through the two vertical wooden planks. This should clear all pigs, but use another Yellow bird if there’s any need. The score in the video below is 89,890.