Until the grey squirrel arrived, that is, and proved itself rather better adapted to broadleaf forests thanks, in part, to its ability to digest acorns.

并且证明自己相当好地适应阔叶林，部分原因是它消化橡实的能力，但那是在灰松鼠没来之前。

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A grey squirrel is scampering from limb to limb.

一只灰色的松鼠在树枝间跳来跳去。

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Ron McDonald, from SNH, said that grey squirrel control would be focussed on the key routes being used by grey squirrels to spread north.

BBC: Battle on to save red squirrels

"We can no longer take red squirrels for granted, like other members of our fauna and flora, they have suffered as the result of the spread of a non-native species - the grey squirrel, " she said.

BBC: Red squirrels conservation plan for Wales