Volunteers record the behaviour of Mei Xiang at the Smithsonian National Zoological Park in Washington DC.

美国华盛顿·史密斯学会国家动物园的志愿者们记录着大熊猫美香的一举一动。

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Other organisations involved in the water vole reintroduction include the Royal Zoological Society of Scotland, Scottish Natural Heritage, Loch Lomond and the Trossachs National Park and water vole expert Derek Gow.

BBC: Water voles back in the Trossachs