大雁有一种合作的本能,它们飞行时都呈V形。这些雁飞行时定期变换领导者,因为为首的雁在前面开路,能帮助它两边的雁形成局部的真空。科学家发现,雁以这种形式飞行,要比单独飞行多出12%的距离。 Dayan has a cooperative instinct, they were V-shaped flight. These geese change their leaders on a regular basis as they fly open at the front to help create a partial vacuum on geese on either side. Scientists have found that flying geese in this form requires 12% more space than flying alone.