就我所知,美國這邊每年三至五月天鵝遷徙到北部,及加拿大南部繁衍後代。深秋時節南遷越冬,來年開春再北遷。天鵝以水麵以下水草為主食。所以一般生活在水草茂盛,水較淺的湖泊,或大湖邊緣。
就我所知,美國這邊每年三至五月天鵝遷徙到北部,及加拿大南部繁衍後代。深秋時節南遷越冬,來年開春再北遷。天鵝以水麵以下水草為主食。所以一般生活在水草茂盛,水較淺的湖泊,或大湖邊緣。
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