Kinda big for a hummingbird, but still very very interesting...
video at link.
http://www.latimes.com/business/la-f...,2685906.storyIt's a bird! It's a spy! It's both
Backed by the Pentagon's research arm, Monrovia firm AeroVironment has developed the Nano Hummingbird, an experimental miniature drone that could one day do reconnaissance by landing on a window ledge.