Crows have a skill once thought to be uniquely human: recognizing geometrical shapes and spotting pattern differences. A new study by researchers at the University of Tübingen reveals that carrion crows can identify geometric regularities without prior training. These findings were published in the journal Science Advances. Researchers test shape recognition in crows Led by Philipp Schmidbauer, Madita Hahn, and Andreas Nieder, the team tested whether crows could detect when one shape stood out. This skill, known as recognizing geometric regularity, is being able to identify when something doesn’t follow a visual pattern—like spotting a plastic star among plastic moons....