In spring or autumn, you may see birds flying in a V shape. This shape is not just beautiful. It is useful for birds that travel a long way.
The wings of the bird in front move the air. The birds behind can save energy by using that moving air. On a long trip, even a little help matters.
The V shape also helps birds see one another. They can stay with the group more easily. The leading bird may get tired, so birds sometimes take turns at the front.
This teamwork can make a long journey a little less tiring.