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Q.

How do birds nevigate?

Tags: birds nevigate
Asked by Milind Madhukar Kulkarni, 10 Jun '10 11:34 pm
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Answers (3)

1.

See dear friend they just chirp but thats not the real navigation they do......the real navigation is done by diffrent actions of wings or legs or also sometimes by some sounds which only their community birds can hear
Answered by Jayesh Shah, 10 Jun '10 11:50 pm

 
  
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2.

They have an inbuilt system to know the sun's position as well as the stars and the ability to discern the magnetic field of the earth. They also use visual clues like seasides, mountain sides.
Answered by nargis bhambi, 10 Jun '10 11:45 pm

 
  
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3.

About 50 animal species, ranging from birds and mammals to reptiles and insects, use Earth's magnetic field for navigation.
Yet Earth's magnetic field is very week. It ranges from approximately 30 to 60 millionths of one tesla. By comparison, magnetic resonance imaging, or MRI, uses magnetic fields from 1.5 to 3.0 tesla
So scientists unsure exactly how birds do it.
New research finds that a photochemical compass may simulate how migrating birds use the magnetic field, along with light, to navigate.
One theory for how it all works has been that photoreceptors in a bird's retina absorb light, which causes a chemical reaction that, in turn, produces a short-lived photochemical species whose lifetime is sensitive to the magnitude and direction of a weak magnetic field.
The idea is supported by the fact that blue light photoreceptors have been detected in retinas of migratory birds when they perform magnetic orientation. However, it has not been confirmed that a magnetic field as we ...more
Answered by Pardeep kapoor, 10 Jun '10 11:40 pm

 
  
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