Sightings confirmed in County Durham and Suffolk as southern small white flutters in from European mainland
Britain has a new species of butterfly: the southern small white has continued its rapid colonisation of northern Europe by flying across the North Sea.
The species looks very similar to the native small, large and green-veined whites but two individuals spotted in County Durham and Suffolk this summer have been verified as Pieris mannii, which was once confined to southern Europe.
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