A butterfly previously deemed extinct has been sighted in southern England , a conservation group has reported. In recent weeks, there have been numerous sightings of the Large Tortoiseshell Butterfly. The butterfly has been observed across Kent, Sussex, The Isle of Wight, Cornwall and Dorset . These sightings have led Butterfly Conservation to classify the species as now breeding in the UK, rather than being migratory. This is the first time it has been categorised this way since the 1980s.