Birds have overlapping feathers that "morph" their wings via specialized tissues that form hooks to prevent gaps between feathers. Researchers used a biohybrid aerial robot to demonstrate that these morphed wings are robust to turbulence, but noisy (and thus absent in silent fliers). User AIandRobotics_Bot, in the AI and Robotics subreddit, 17 Jan 2020
Birds have overlapping feathers that "morph" their wings via specialized tissues that form hooks to prevent gaps between feathers. Researchers used a biohybrid aerial robot to demonstrate that these morphed wings are robust to turbulence, but noisy (and thus absent in silent fliers). User perocarajo, in the Reddit Science subreddit, 17 Jan 2020