Is it a bird? Is it a plane? No, it's the army's latest $4million spy drone disguised as a hummingbird, measuring just 16 centimetres | Daily Mail Online
A bird James Bond might love - AOPA
This weird-looking pigeon is actually a drone that flies with real feathers | MIT Technology Review
A drone that flies (almost) like a bird
RMIT creates bird-like drone with flappable wings | TechRepublic