Interesting Facts About Bird Migration
By: NDTVNewsDesk
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Migration involves long and often dangerous journeys as birds fly thousands of kms to find the best ecological conditions and habitats.
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Migratory birds use the sun, stars, and the Earth's magnetic field to find their way.
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Sometimes they make their first migration on their own without ever seeing the destination before.
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Before a long trip, birds often gain a large amount of fat, sometimes doubling their pre-migration weight, to use as fuel.
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They may also temporarily shrink some internal organs to make more room and energy for flight.
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The Arctic tern travels the furthest, with an annual round trip of over 44,000 miles from the Arctic to Antarctica and back.
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Many birds fly in a V-shaped flock to reduce air resistance and conserve energy.
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Some birds also fly at higher altitudes to take advantage of air currents for gliding and conserving energy.
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