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Some would argue that there are really two puzzles: (1) how birds navigate over thousands of miles to find their way between breeding and wintering sites, and (2) how birds find their way back to precise nesting or roosting sites (homing behavior).
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www.stanford.edu/group/stanfordbirds/text/essays/Naviga...
www.stanford.edu/group/stanfordbirds/text/essays/Navigation.html
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About 50 animal species, ranging from birds and mammals to reptiles and insects, use Earth's magnetic field for navigation. ... New research finds that a photochemical compass may simulate how migrating birds use the magnetic field, along with light, to navigate.
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www.livescience.com/mysteries/080501-llm-birds-navigate...
www.livescience.com/mysteries/080501-llm-birds-navigate.html
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Naked Scientists News - 12th May 2002 - How Do Birds Navigate and How Do People Have a Sense of Direction ? ... These iron crystals pick up the Earth's magnetic field, almost like an internal compass, allowing the fish to navigate. Now scientists have found that people too may be sensitive to the Earth's magnetic...
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www.thenakedscientists.com/HTML/content/news/news/953/
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Homing pigeons may use a magnetic "map" inside their beaks to navigate, according to new research. ... The findings add to the debate over whether pigeons and other birds chart their flight paths by using a magnetic sense or by following scent clues in the atmosphere. ... Lobsters Navigate by Magnetism, Study Says...
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news.nationalgeographic.com/news/2004/11/1124_041124_ma...
news.nationalgeographic.com/news/2004/11/1124_041124_magnetic_birds.html
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It has long been known that birds and many other animals including turtles, salamanders and lobsters, use the Earth's magnetic field to navigate, but the nature of their global positioning systems (GPS) has not been completely understood. O...
http://www.sciencedaily.com/releases/2008/04/0804301342...
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Cochran tracked more birds in the late 1970s and in 1984. However, much of the data was not collected until 2003 after Wikelski joined Cochran and was eager for enough data to draw a clear conclusion about how birds navigate.
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www.princeton.edu/pr/news/04/q2/0428-wikelski.htm
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For decades, scientists have known that migratory birds use Earth’s geomagnetic field—along with light, stars, and other cues—to guide them on remarkably long journeys. But it is unclear just how birds sense this relatively weak field and use it for navigation.
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discovermagazine.com/2007/oct/birds-navigate-using-magn...
discovermagazine.com/2007/oct/birds-navigate-using-magnetic-compass-vision
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Birds seem to know exactly where they are going when they are flying. It is almost as if they have their own flight plan. Have you ever wondered how birds have been able to stay on course without any complex equipment and technology that we have available? ... For a while it has been theorized that birds and other animals,
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www.bellaonline.com/articles/art1341.asp
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Professor Peter Hore, a physical chemist at Oxford University, explained: "Because the Earth's magnetic field is so weak, many people found it difficult to understand how it could affect bird or animal sense organs in a way that would help them to navigate. ... Birds may use similar chemical reactions in their retinas,
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www.independent.co.uk/news/science/revealed-secret-of-h...
www.independent.co.uk/news/science/revealed-secret-of-how-birds-navigate-during-migration-818766.html
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