Why do geese form an inverted V pattern when they fly? A quite interesting question and even though we can’t be 100 percent sure about the answer, scientists have determined two benefits that arise from this V-shaped formation.
As it turns out, this weird flying habit conserves energy and improves visual assurance.
Here’s why. (the article continues after the ad)
Because each bird flies in front of each other, the whole formation results in a wind resistance reduction as each bird takes full advantage of the air disturbance that is caused by the flapping of the bird in front. Because of this “tactic”, tired geese can go to the back (less resistance) when they are tired and therefore, the entire group can fly for longer. In fact, a 2001 Nature article, revealed that birds who don’t fly in formation (such as the pelicans) flap their wingers more frequently and can fly for less time as they have higher heart rates.
Because the bird’s eyes are located on the sides, this V pattern helps the birds keep track of the entire group and allows them to follow more easily the direction of the flight. This is why fighter pilots often use this formation when flying with their jets.
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Sources: Why do geese fly in a V? | Ever Wonder Why?: Here Are the Answers!