Neat. I wonder how much work it will take before it can hover. I just spent too much time on YouTube watching people crash drones (often into people). I could see some applications for this filming at crowded venues once it's more developed.
This reminds me of the first robot bird <a href="http://ed.ted.com/on/xtyd4M5V" rel="nofollow">http://ed.ted.com/on/xtyd4M5V</a> that was built a few years ago. I would be interested in knowing how difficult it is to build a robot bat once you already know how to build a robot bird. Is there any specific challenge in emulating the way bats fly compared to birds?