do birds use GPS to navigate how do they known which route to exactly take every year when the they migrate
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No they don't use GPS to navigate but they seem to have an internal global positioning system 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.
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positioning system (GPS) that allows them to follow the same pattern every year. ... The beak helps birds to determine their exact position. Some researchers think a bird can smell its way across a flyway.
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