7-14 3 Birds
Loop/Modified Arc first yellow bird to take out two balloons with attached spaceships. Make sure to take out closest balloon (to allow access for next white bird), and either of the other two balloons (I achieved higher score with lower balloon)
Arc second white bird to take out back side of observatory, popping pig and causing partial collapse.
Aim third blue bird to strike remaining balloon(s)
(May be alternate high score strategies. Also broken wood from all spaceships helpful for high score)
Some High Score Targets:
3 Stars: 60,000
*Top 150: 70,600
*Top 100: 71,630
*Top 10: 77,800
*Top scores in Massachusetts in March, 2011 according to Crystal (a former feature of the Mobile App).