Wings warp for birdlike agility

Taking cues from seagulls, a bird-size prototype aircraft morphs its wings to navigate cluttered environments. The ability to shift its wings between an M shape for cruising and landing and a W shape for dives and turns bodes well for tasks in tight spots, from tracking wildlife in canyons to spying on an urban enemy, says Mujahid Abdulrahim of the University of Florida in Gainesville.