Question

how do birds find their direction while migrating ?​

Answer 1

Answer:

The flight paths used by birds in their annual migrations are called flyways.

Scientists are not entirely sure how birds navigate their flyways. They seem to have an internal global positioning system (GPS) that allows them to follow the same pattern every year. A young bird imprints on the sun and stars to help orient it. Some researchers think a bird may also recognize landmarks.

Individual organs also contribute to a bird’s remarkable navigational ability. A bird’s eyes interact with its brain in a region called “cluster N”, which probably helps the bird determine which way is north. Tiny amounts of iron in the neurons of a bird’s inner ear also help in this determination.

Most surprisingly, a bird’s beak helps contribute to its navigational ability. The beak helps birds determine their exact position. Some researchers think a bird can smell its way across a flyway. This “olfactory map” would orient a bird to terrain and topography. The trigeminal nerve, which connects a bird’s beak to its brain, may also help a bird assess its exact location. Researchers think the trigeminal nerve may help birds evaluate the strength of the Earth’s magnetic field, which is stronger at the poles and weaker at the Equator.

Answer 2

Answer:

Even the nocturnal birds use the position of the sun at sunset to know their position. Nocturnal birds also use the stars. This has been proved by letting birds fly in a planetarium and changing the stars' position. Another tool is the earth's magnetic field (earth's north and south magnetic poles).

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Explanation:

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