Bird migration is one of the most fascinating phenomena in nature. Every year, millions of birds fly across continents and oceans, following ancient routes that are often invisible to humans. But how do they know where to go? How do they navigate such long and complex journeys? Scientists have been studying these questions for decades, and they have discovered some amazing facts about bird migration. One of the main challenges for migrating birds is to find their way in the vast and changing environment. Birds use different cues and strategies to orient themselves, such as the sun, the stars, the earth’s magnetic field, landmarks, and even…