recently published a paper in the journal Science Robotics, a bat-inspired bionic aircraft:

wings are made of silicone film, with a carbon fiber skeleton, and the body is very light, weighing only 93 grams.

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its joints are very flexible:

it flies like this:

its advantage is that it is more flexible than drones. People hope that this kind of flying robots can adapt to more complex situations and help with post-disaster rescue or something. But at present, the robot still lacks some bat skills, such as it can't hang up anywhere and stand by, and the battery life and the ability of components to resist impact are still being improved.

related report: http://www.sciencemag.org/news/2017/02/watch-new-robot-fly-just-bat