A couple call at another bird that has invaded their territory. Nests, built of mud, moss, and grass, may be refurbished and reused in subsequent years.

天鹅夫妇对侵入自己领地的鸟儿大吵大嚷。它们的巢是泥土、苔藓和野草做成的，可以翻新、修补，多年重复使用。

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Nests, built of mud, moss, and grass, may be refurbished and reused in subsequent years.

它们的巢是泥土、苔藓和野草做成的，可以翻新、修补，多年重复使用。

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He extolled their niceness, snapping them as they basked companionably on warm mud or on a favourite bank of long grass, the forefoot of one embracing the back of another.

他称颂鳄鱼的漂亮，当鳄鱼们在暖和的烂泥中懒洋洋地晒太阳，或在舒适的长草坡上，一只鳄鱼的前足趴在另一只鳄鱼的背上时，他拍摄它们。

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Sediment-carrying rivers have been diverted, sea level has risen (increasing the volume of water in the lagoon), a deep-water channel has been dredged for shipping, and turbid waters are killing the eel grass that stabilises mud flats.

ECONOMIST: Flood barriers