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The present world has reached to a stage where most of the sophisticated and sensitive tasks are mostly done by artificial hands. This paper discuss about the details of artificial birds are also called as ornithopters which belongs to Micro Arial vehicle (MAV) category. Bio-mimicking robots have been replaced the place of human with their uncompromised accuracy and efficiencies. However the real challenges in developing MAVs is still unsolved and not interpreted as it flies in the transient and low Reynolds number flow. This paper investigated the aerodynamic factors of fly's which influence their flight, different kinematic mechanisms which drives the vehicle and different types of designs for wings and their performance. In line with this, both past and future of this innovative area were discussed. One other hand selection of material is also plays vital role in case of MAVs weight consideration. So, this paper explain the different material which suited for this kind of flying machine.

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