Widespread in England, it joins other species to have expanded range in recent years due to climate change

It may have been a fairly awful summer for butterflies but Scotland continues to enjoy some pleasant lepidopteran surprises, thanks to global heating.

Its list of resident species increased by one this year when the gatekeeper, never officially recorded north of the border in the past century, was spotted in several locations. Meanwhile, the elusive white-letter hairstreak, which was only recorded for the first time close to the River Tweed in 2017, has now been found in Dundee, more than 60 miles farther north.