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livetta livetta
 

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 M¢25  Funded By Mahalo ? |  August 20, 2009 08:42 AM

Why do birds migrate ?

what is the mystery behind birds even flew from one continent to another.
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mithrandir mithrandir
 
 August 20, 2009 09:06 AM
Even though the exact reason is not yet known, recent research suggests that the main reason is food security. Most birds migrate from areas that are support little fruits or or other foods during winter, and by moving to warmer areas, their basic food supply is more secure, thereby allowing them to have a better chance at survival.

Even more recent studies (published this week in Europe) even indicates that many birds don't migrate as far south as they used to, because there are nearer locations that are warm enough to have continuous food supplies.
Source(s):
http://www.sciencedaily.com/releases/2007/03/070302082310.htm

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Helpful: albanian, bunnyphuphu

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coreyl coreyl
 
August 20, 2009 09:08 AM
The reasons are complex and not fully understood. But a simple explanation is food and a safe place to breed. Birds which breed in the summer in the extreme north such as the Arctic benefit from an abundance of food as plants and insect life flourish in the long daylight hours; (took from 2nd link, see for more info, u will find even more links there!)

Here are some science articles:

http://www.sciencedaily.com/releases/2007/03/070302082310.htm
http://www.naturia.per.sg/buloh/birds/migration.htm

Maybe you can also find some hints while looking for Rupert Sheldrake:
http://en.wikipedia.org/wiki/Morphogenetic_field
we all communicate through this field!

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hellcareta... hellcareta...
 
August 20, 2009 09:24 AM
in search of food and some can't bear the climate change

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kareul kareul
 
August 20, 2009 09:29 AM
The reasons are complex and not fully understood. But a simple explanation would be for food.Food scarcity is the number one reason that predict a species migratory behavior. Food availability is the underlying process not diet and habitat.Another reason for migration is a safe place is that birds need a safe place to breed. Some birds fly thousands of miles between South America, Central America and canada because they need a place to stop,eat and rest. Some birds begin migrations early in july and other species distinct southward movement cannot be detected until winter.


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rishiku rishiku
 
August 20, 2009 11:15 AM
I see that everyone said the same answer so....I will go another route....

(TEVYE)
Tradition, tradition! Tradition!
Tradition, tradition! Tradition!

(TEVYE & PAPAS)
Who, day and night, must scramble for a living,
Feed a wife and children, say his daily prayers?
And who has the right, as master of the house,
To have the final word at home?

The Papa, the Papa! Tradition.
The Papa, the Papa! Tradition.

If you dont get it....well its funny to me......Ya ha deedle deedle, bubba bubba deedle deedle dum
Source(s):
http://www.en.wikipedia.org/wiki/Fiddler_on_the_Roof


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