1-11 1 Bird
Aim first yellow bird just above small bird in cage atop first post. Try to get bird through to edge of third tower or to get tilting second tower to destabilize third tower.
(An alternate high scoring two bird solution is to use second yellow bird to hit low on third tower and get top of tower to knock down rock which will crush debris below. I believe the one bird solution will score more consistently though)
2 Stars: 76,000
3 Stars: 83,000