Meaning: The sentence describes how birds travel to warmer places during winter.
Choice of Words: The word "birds" refers to flying animals. "Fly" means to move through the air using wings. "South" is a direction.
Alternative Expressions
The birds migrate south for the winter.
Meaning: This means the same as the first sentence, but it uses a different word to describe the birds' movement.
Choice of Words:Migrate means to move from one place to another, especially during certain times of the year. South is a direction. Winter is the coldest season of the year. When you put them together, "The birds migrate south for the winter" means that the birds travel to a warmer place during the winter.
The birds head south for the winter.
Meaning: This means the same as the first two sentences, but it uses a different word to describe the birds' movement.
Choice of Words:Head means to move in a particular direction. South is a direction. Winter is the coldest season of the year. When you put them together, "The birds head south for the winter" means that the birds travel to a warmer place during the winter.