It's well-known that the CIA and U.S. Army are using unmanned drones to launch attacks in Pakistan and Yemen, killing terrorists and innocent people.

However, the development of surveillance drones is going on at a much smaller level, as tiny remote controlled vehicles based on insects are being created, reports The Daily Mail.

Researchers have developed drones with bug eyes, bat ears, bird wings, and honeybee-like hairs.

The University of Pennsylvania GRASP Lab recently univeiled a network of 20 small drones flying in synchronized formations to operate "with little or no direct human supervision' in 'dynamic, resource-constrained, adversarial environments."

Some say that miniature drones, or micro air vehicles (MAVs), can be used to search battlefields and search for victims trapped in rubble.

The US Air Force has already admitted to creating drones "as tiny as bumblebees' that could not be detected and would be able to fly into buildings to 'photograph, record, and even attack insurgents and terrorists."