These robot birds, each lighter than a golf ball, can fly autonomously in a flock for up to seven minutes. | Mashable

This robot can fly just like a real bird: It’s called PigeonBot II, and it’s designed to replicate the natural flight mechanics of real birds, achieving rudderless flight through biomimetic morphing of its wings and tail. Its design incorporates 52 real pigeon feathers, providing lightweight, elastic stiffness and natural aerodynamic properties, allowing for smooth, continuous morphing. Weighing approximately 300 grams, comparable to a real pigeon, the robot is equipped with small propellers for