Question

What is meant by migration of birds, how it is regulated?​

Answer 1

Answer:

Bird migration is the regular seasonal movement, often north and south along a flyway, between breeding and wintering grounds. Many species of bird migrate. ... The timing of migration seems to be controlled primarily by changes in day length.

Explanation:

Answer 2

Explanation:

Bird migration is the regular seasonal movement, often north and south along a flyway, between breeding and wintering grounds. Many species of bird migrate.... The timing of migration seems to be controlled primarily by changes in day length.

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