Plas Newydd property manager Jane Richardson said: ‘We’re so excited that the red squirrels are happy in their new home.
‘We intend to set up a reporting area in the summer house so visitors can tell us when they spot them.’
Miss Richardson noted that red squirrels haven’t been seen on the estate for 20 years, ‘but it was once a stronghold for the species, so we know it’s a location where they’ll thrive’.
David Bullock, the National Trust’s head of nature conservation, warned that this ‘refuge’ for red squirrels must remain grey-squirrel free, so that the red squirrels aren’t infected with squirrel pox.
Mr Bullock said: ‘It’s essential that quarantine measures are introduced and a contingency plan is in place to immediately destroy any grey squirrels that do manage to cross the Menai Strait.
‘Without these measures, all the good work could be undone.’
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