Each year, without headlines or fanfare, billions of birds undertake journeys that defy human comprehension. They fly thousands of miles between breeding and wintering grounds, navigating by stars, Earth’s magnetism, and landscapes they’ve never seen. This global migration represents one of nature’s most magnificent phenomena—an ancient rhythm that continues despite mounting human obstacles. The mechanisms of migration remain wonderfully mysterious. Recent research reveals that birds may actually see magnetic fields through special photoreceptors in their eyes. They memorize star patterns as fledglings and recognize topographic features through mental maps we can scarcely imagine. Some species even calibrate their navigation using sunset colors, while others follow scent trails or infrasound waves…