The Bar-headed Goose (Anser indicus) stands as a marvel of physiological engineering, holding the distinction of being one of the world's most high-altitude avian migrants. Each year, these birds embark on a daunting journey between the lowland wetlands of India and the high-altitude breeding lakes of the Tibetan Plateau. Unlike other waterfowl that circumnavigate mountain ranges, these geese fly directly across the Himalayan chain, reaching altitudes exceeding 29,000 feet, where the partial pressure of oxygen is barely a third of that at sea level. Recent telemetry studies have provided unprecedented insight into how these birds sustain such extreme physical exertion in the thinning air. While most migratory birds rely heavily on favorable tailwinds to conserve energy during long-distance flights, the Bar-heade...