飞越各大洲(Winging it across continents)

在世界候鸟日庆祝我们的旅行羽毛朋友！有些移民确实令人震惊。这条条斑尾龙开始了从阿拉斯加到新西兰的6835英里直飞太平洋的飞行。这只小小的红宝石喉蜂鸟，体重不到一便士，一路穿越墨西哥湾——就其体型而言，这似乎是一项不可能的壮举。候鸟在全球范围内航行，本能地知道何时何地迁徙以利用季节性的丰富资源。北极燕鸥的洲际之旅从北极到北极，覆盖了18000多英里，比它们都要精彩。它们的迁徙路线是根据环境线索创建的通道。
原文：
Celebrate our travelling feathered friends on World Migratory Bird Day! Some migrations are truly astounding. The bar-tailed godwit embarks on a 6,835-mile nonstop flight across the Pacific from Alaska to New Zealand. The tiny ruby-throated hummingbird, weighing less than a penny, and makes the trip all the way across the Gulf of Mexico—a seemingly impossible feat for its size. Migratory birds navigate the globe, instinctively knowing when and where to move to exploit seasonal abundance. The Arctic tern outshines them all with its intercontinental journey from pole to pole, covering more than 18,000 miles. Their migration routes are passages created based on environmental cues.
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