The Insectothopter was a miniature unmanned aerial vehicle developed by the United States Central Intelligence Agency's research and development office in the 1970s. The Insectothopter was the size of a dragonfly, and was hand-painted to look like one. It was powered by a small gasoline engine to make the wings move and was fueled by a very small amount of gas. The project was abandoned when the Insectothopter was found to be too difficult to control in crosswinds.
The CIA produced and released the below video, and FOIA requests are currently being processed for additional documented information.