Red squirrels have little immunity to squirrelpox virus spread by grey squirrels.
Hugh Rowlands
There is no single, straightforward way to safeguard the future of this native mammal at the moment – but here are some options
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Squirrel feeders laced with contraceptives could be used to suppress grey squirrels in the UK.
A European pine marten climbing a tree in the Levoča Mountains, Slovakia.
František Koneval
Where pine martens have recovered, red squirrels have tended to benefit while grey squirrels have declined. Scientists weren’t sure why – until now.
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Camera traps allow citizen scientists to peek into the hidden lives of Britain’s mammals.
The pine marten – cute but cunning.
Karen Bullock/Flickr
We should welcome a native predators’ return across the British Isles, while at the same time being honest about the implications.
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Grey squirrels hate these reclusive, cat-sized predators.