What is migratory birds from class9
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The movement of organisms in large numbers from one place to another place is termed as migration. There are many reasons for migration. The term migration is mainly used to define regular and periodic movements of population away from or back to their place of origin. These migrations are of various types. Some may span for an entire lifetime and it happens to be a single migration of an individual. This is in the case for the Pacific salmon. On another hand, an individual may migrate frequently, along with many of the migratory birds and other mammals.
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