Why do birds migrate?
by 
keithold thanks all baggers
ANSWERS: 3
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Birds migrate because their current environment is too hot or too cold or their food supply has run out. Birds that migrate in the northern hemisphere have an inborn sense of north and south. When it is too cold they head south but if its too warm they will go north
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For various reasons, the important ones being, to adapt to the climate change and for reproduction during their season.
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To escape harsh weather.
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