- the winged adults release pheromones - scent messages,
长着翅膀的成虫便释放出信息素 即一些气味信号 - which tell others in the group that they must move on.
提醒蝗群中的其它成员它们应该动身了 - And when groups merge,
蝗群合并之后 - they form a swarm.
形成了一团蝗虫云 - An adult locust eats its entire body weight every day,
成虫每天的进食量相当于自己的体重 - and a whole swarm can consume literally hundreds of tonnes of vegetation.
而整团蝗虫云能消耗掉数百吨植物 - They have to keep on moving.
它们必须不停地迁徙
they form a swarm. 形成了一团蝗虫云
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