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为了解开鸟类的定向迁飞之谜,科学家们做了许多实验。他们在某一地点捕捉来大量鸟类,并给它们作上标记(主要是戴环),然后用火车或飞机把这些鸟类运往几百公里以外的地方放飞,几天以后,他们惊喜地发现:这些鸟类竟又回到了捕捉它们的地方!
Scientists have done a lot of experiments in order to solve the mystery of directional bird migration. They captured a large number of birds at a site and tagged them (mainly wearing rings) and then transported the birds hundreds of miles away by train or plane to fly and a few days later they were pleasantly surprised to find These birds actually went back to where they were caught!