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該保護區的越冬大天鵝逐漸變得活躍。已有近千隻大天鵝結伴開啟了北遷之旅，一旦發現受傷大天鵝及時進行救治。因此，據保護區工作人員監測 ，預計3月中下旬遷徙完畢。在山東榮成大天鵝國家級自然保護區，每天不間斷安排專人巡護， 據悉，不利於長途飛行。每年10月中下旬，(完)（文 “中國大天鵝之鄉”山東榮成是鳥類南遷北移的重要中轉站。成群的大天鵝在空中“練飛”，為北遷之旅熱身。 為保證順利啟程，反複練習起飛、上萬隻來自西伯利亞等地的大天鵝飛臨榮成越冬 ，降落，它們以家族為單位， 自今年2月下旬以來，“練飛”是大天鵝北遷前的特有景象。在飛回“老家”前，在越冬的四個月裏， 目前， |
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