Mendoza also noted signs of an imminent hurricane, including odd behaviors among birds, which are exquisitely sensitive to shifts in barometric pressure. When they sense a pressure drop, they might try to outrun it. The result is unusual species showing up in unexpected places, sometimes migrating from America to Europe to escape a hurricane. A few days before a storm, birds might go into a feeding frenzy to bulk up before winds and rains wipe out their feeding grounds. All these behaviors are easily observable.
