They are able to navigate using the sun and the earth's magnetic field.
2006-09-14 02:38:04
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answer #1
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answered by Anonymous
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Since some of the others already fairly answered this, I will make just a small addition. In studying the earth's magnetic fields while getting my geology degree, I realized that the earth's magnetic Field always points north but it also points at an angle upward. At the poles, it is nearly vertical, at the equator nearly horizontal. Therefore everywhere has it's particular coordinate of horizontal angle and vertical angle. Also there is a phenomena known as residual magnetism. When a magnetic substance solidifies, as in magma, it retains the polarity of the earth magnetic field at that time. Since it changes frequently, there exists an interesting pattern of magnetic anomalies that would make migrating much easier if you could sense these magnetic fields. It is probably especially useful to ocean migrators.
2006-09-14 12:24:05
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answer #2
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answered by JimZ 7
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There is still a lot of discussion in the scientific circles of ornithologist that strongly suggests that birds use the planets magnetic field to guide them to and from their nesting grounds each year during their migrations. There are also others in the community that say that the first migration that a bird takes it imprints the landmarks along the flight as guided by the leaders of the group. This imprinting is similar to that of newborns that imprint on their parents.
Hope this helps.
2006-09-14 09:42:09
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answer #3
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answered by .*. 6
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Yeah isn't that crazy they use the sun and a sensor in their brains to detect the magnetic fields of earth like a compass. They did this one experiment where they put a little helmet on a homing pigeon and it emitted a really strong magnetic field. And the bird ended up getting lost and just flying around randomly because it messed with its ability to sense direction.
2006-09-14 09:42:43
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answer #4
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answered by quickblur 6
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there are many methods:-
1)earths magnetism-birds have a in built magnetic system which works like a compass
2)some birds tend to make a map in mind while travelling in flocks
3)Some believe that they do it with star-mapping
2006-09-14 09:41:42
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answer #5
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answered by Anonymous
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Birds are blessed with a builtin navigation system. They are able to remember their onward path, and while back they use their memory and buit in navigation syststem.
2006-09-14 09:38:54
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answer #6
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answered by sravi_iyer 1
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As strange as it sounds, it is ingrained in the make-up of the brain. At least, that was what I was taught.
2006-09-17 13:08:50
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answer #7
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answered by greylady 6
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It's GPS in-built...
2006-09-14 09:42:27
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answer #8
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answered by Anonymous
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It's inborn and genetic.'
2006-09-14 09:41:43
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answer #9
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answered by Bluealt 7
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gps
2006-09-14 09:36:55
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answer #10
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answered by a4kneekater 2
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