U.S. Department Of Defense To Use Hummingbirds As Spies
Robotic hummingbirds will be able to discretely enter areas where people would not be able to go without being detected and will look so realistic that people could easily be fooled.
huffingtonpost.com • 7.8.09 @12:37PM

And the toy helicopters have an advantage in that the blades act as gyro-stabilizers by adding a ton of inertia. This thing is flopping all around. 7.8.09 @12:38PM