红蟹迁徙让澳大利亚一座岛屿上的交通陷入停顿

红蟹从森林到海洋的确切时间是由降雨和月相决定的。雄蟹带头游行，雌蟹随后也加入。到达海洋后，它们交配产卵，每只雌性能够产多达10万枚卵。然而，大多数小螃蟹再也没有回到森林里，因为它们最终会被鱼和鲸鲨吃掉，对它们来说，这是一场名副其实的盛宴。更糟糕的是，成功抵达海滩的蟹幼虫经常会被返回的同种成年蟹吃掉，因此它们有一个名字——食人蟹。

The annual migration of red crabs has brought traffic to a standstill on an Australian island. Apart from the epic journey, the species is also notorious for eating its own young.

Tens of millions of crustaceans are swarming Canberra-governed Christmas Island, which is almost a thousand miles northwest of the Australian mainland. Parks Australia, a government body in charge of wildlife conservation on the island, has deployed its staff to manage traffic, rake crabs off roads and provide advisories to local residents regarding road closures. Authorities are well-prepared to deal with the epic crab march as it repeats every year, usually in October and November. There are even special bridges and tunnels in place, built over and under busy roads so as to minimize the number of crabs crushed by cars. The sight of millions of these creatures making their perilous trek has become one of Christmas Island’s main tourist attractions.