Water voles are declining, but brown hare and polecat populations are rising. Greater and lesser horseshoe bat populations have risen 32% and 41% respectively over the past 10 years.

水鼠数量在下降，而棕色野兔和臭鼬的数量却在上升。在过去十年间，大菊头蝠和小菊头蝠的数量已分别上升32%和41%。

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Newly-planted native trees have also been reintroduced to help preserve the habitat of the lesser horseshoe bat.

BBC: John Whitehead at the trail

The gardens are also involved in planting, to protect the home of Europe's largest colony of the lesser horseshoe bat, a site of special scientific interest.

BBC: John Whitehead at the trail