Which of the following is an ultimate explanation of the 32,000 km round trip yearly migration of Arctic terns?

+2 votes

 

  

Terns use solar positioning and their circadian clock to navigate to the south.

  

To find nesting sites in the north, Arctic terns follow the North Star during evening flights.

  

Terns use their buoyancy and tapered wings to complete the long flights.

  

Migration occurs so terns can feed on fish that are available in different parts of the world in different seasons.

 

asked Jan 2, 2013 in Biology by anonymous
    

1 Answer

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Migration occurs so terns can feed on fish that are available in different parts of the world in different seasons.

 

answered Jan 2, 2013 by anonymous

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