One of the greatest mysteries of bird life is traveling. Every year during autumn and early winter, birds travel from northern regions of Asia, Europe, and America to the southern warmer lands. They make the return journey again during spring and early summer. They are punctual unless they are delayed by bad weather. They face many dangers and hardships while traveling long distances through the air, over hills, forests, plains, and large stretches of water. Sometimes sudden storms arise and drive them far out of course. Often they are blown right out to sea and are drowned in the wild waves. At night bright lights attract and confuse the birds. They cannot fly at their fastest. The migration speed is usually from 48 to 64 km an hour and rarely exceeds 80.
Answer the following questions:

Q 1) When do the birds travel from northern regions to southern warmer lands and why?

Q 2) What danger do they face when they are flying over the sea?

Q 3) What happens to these birds at night when they see the lights?

Q 4) When do the birds make their return journey?

Q 5) What is the migration speed of the birds?

Q 6) Which is the greatest mystery

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