Drones often hover in the air, noisy and whining. They can already be used for many tasks, but not when you need some quiet. Their batteries would also last longer if they could take a “rest” from time to time. But when a drone is monitoring a rainforest, its cluttered surroundings and its own gripper arm become too tricky for its camera-based vision. Until now.Drones often hover in the air, noisy and whining. They can already be used for many tasks, but not when you need some quiet. Their batteries would also last longer if they could take a “rest” from time to time. But when a drone is monitoring a rainforest, its cluttered surroundings and its own gripper arm become too tricky for its camera-based vision. Until now.[#item_full_content]