每年10月,南亚岛国马尔代夫都会迎来数百万只蜻蜓,此时的马尔代夫上空如同在举办盛大的蜻蜓聚会。10月到12月位于印度洋低空的季风都会从南吹向北,这对于从北向南迁徙的蜻蜓大军来说是可怕的麻烦,但与此同时,在1千米以上的高空,会有一个叫做“热带辐合带”的季风带从印度向南移动,穿过马尔代夫,直达非洲大陆。于是,蜻蜓们便用提升飞行高度、避开逆风的方法,借 In October each year, millions of dragonflies will be welcomed by the South Asian island nation, Maldives. Maldives at this time is like holding a grand dragonfly party. October-December monsoons in the Indian Ocean at low altitudes are going north-south, which is terrible trouble for the dragonfly army that moves north from north to south, but at the same time, at a height above 1 kilometer, “Tropical Convergence Zone ” The monsoon belt moves south from India through the Maldives, reaching the African continent. As a result, dragonflies will use to enhance the flight height, to avoid the headwind method, by