SAEDNEWS: Many birds travel thousands of kilometers during migration. They navigate using the Earth’s magnetic field, the Sun, stars, landmarks, and familiar environmental signals.
According to SAEDNEWS, migration is one of the most remarkable abilities found in many bird species. During seasonal journeys, birds may travel across forests, mountains, deserts, and oceans. Young birds can often begin migration with limited previous experience, while older birds become more accurate by learning from earlier journeys. Their navigation depends on a combination of inherited abilities and information gathered from the environment.
One important navigation system involves the Earth’s magnetic field. Birds appear to have a magnetic sense that helps them determine direction, especially when familiar landmarks are unavailable. Research suggests that specialized biological mechanisms may allow birds to detect changes in magnetic-field strength and direction. This ability can provide a useful compass during long-distance travel, including journeys made in darkness or over areas with few visible landmarks.
The sky also provides valuable directional information. During daylight, some birds can use the position of the Sun as part of a navigation system. Their internal biological clocks help them compensate for the Sun’s movement across the sky. At night, certain migrating birds can use patterns of stars to maintain their direction. These celestial cues become especially useful when birds are traveling through unfamiliar regions.
Birds can also learn important features of the landscapes they cross. Mountains, rivers, coastlines, and other large geographical structures can serve as visual guides. Some birds may also use smells carried by the air to identify regions and recognize familiar environments. As birds make repeated journeys, these environmental signals can become part of a detailed mental map that helps them return to important locations.
Bird migration does not depend on a single navigation method. Birds can combine magnetic information, sunlight, stars, landmarks, and other environmental cues to stay on course. If one signal becomes difficult to use because of clouds, darkness, or unfamiliar surroundings, another may provide useful guidance. The ability to combine multiple sources of information makes long-distance migration more reliable and helps explain how birds can repeatedly complete such challenging journeys.
