The Flying Martha Ornithopter is a mechanical toy that when wound, flaps its wings through the air just like a real bird. The simple invention is built entirely from bamboo and Mulberry paper, and released just like a paper airplane. The ornithopter was built by Haptic Lab to honor the very last passenger pigeon, Martha, who died while in captivity at the Cincinnati Zoo in 1914.

Source: A Wind-Up Bamboo Passenger Pigeon by Haptic Lab | Colossal