Her moment of peace was interrupted by the sight of a crow darting through the air, closely pursued by a pair of redstarts. The larger black bird zigzagged frantically, attempting to evade the persistent dive-bombers. Claire couldn’t help but smile as she watched the fierce avian parents relentlessly chase the crow back and forth. A random thought crossed her mind—did crows truly fly in a straight line if left undisturbed? If that particular crow kept to its original path, it would head straight for...