25. Bar-Headed Goose
Bar-headed geese are legendary for their awe-inspiring migrations over the towering Himalayan mountains. These birds are specially adapted to fly at extreme altitudes, where oxygen is scarce and temperatures are frigid. To stay on course, they rely on visual landmarks, unique physiological adaptations, and possibly geomagnetic information to guide their journey. This extraordinary natural GPS system allows them to undertake one of the world’s most challenging and impressive migrations. Source: BBC Earth