bbc纪录片：【BBC美丽中国】潮涌海岸 51
http://t1.g.hjfile.cn/listen/201209/201209150346311331976.MP3The Mai Po marshes are part of the Pearl River estuary, whose muddy shores abound with crabs, worms and mud-skippers. Exposed at low tide, this smorgasbord of mud-life attracts both waders and the gei wai birds. Here on the mudflats of Inner Deep Bay, each kind of bird has its own specific feeding zone defined by the depth of the water, the length of its beak and its feeding technique.退潮时暴露出泥中生命的就像自助餐一样，不仅吸引了涉禽，还吸引了基围的鸟儿。在后海湾内湾的泥滩上，每种鸟类都拥有自己的领地：这决定于水的深度、它们的喙长和捕食的技巧。
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