蝴蝶的遠征
所屬欄目：綠色空間
所屬頻道：CCTV-10科教
年份：2010
展開全部
簡介：我們知道候鳥的遷徙一生中往往會有好幾次。而美洲的一種蝴蝶：帝王蝶卻剛好相反，它們要用好幾代的生命才能完成一次遷徙，具體地説就是最後完成遷徙的那只蝴蝶，已經是原先開始遷徙時的那只老蝴蝶的第6代重孫子了。更不可思議的是，每一隻蝴蝶都要經過幼蟲、變蛹、化蝶等幾個階段，化蝶前它們是沒有飛翔能力的，它們只好就地吃喝長大，化蝶後才能去繼承先輩的遺志，踏上征程。這讓人不禁要問，它們怎麼能認得6世前的祖輩的來時路？又如何知道自己要去的地方在哪呢？收起
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