posted on Jul, 2 2009 @ 04:19 PM
Here is a link to the youtube video.
It has no sound, but very cool to see what they are working on...
AeroVironment flapping-wing nano-UAV
It is small flying devices that use small wings instead of propellers.
I imagine that the flapping wings are more silent and with a little work, could easily look like a bird.
[edit on 7/2/2009 by mrmonsoon]