As far as I know, there are two types of robot flies. One species developed at Harvard. This project was sponsored by many famous DARPA, which is engaged in defense research.

    A fly weighs 60 grams and a wingspan of 3 cm. The principle of movement is based on the movement of a real fly. More details .

    The second type was developed at the University of Berkeley, its weight is 25 grams. They have a detailed description and photos of this miracle on the site .

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