From The Guardian, Patrick Barkham , Eddited by - Vinuri Randula Silva, Endangered species enjoys best summer in 150 years thanks to habitat restoration scheme A large blue butterfly in one of two new colonies re-introduced to a National Trust Cotswold site. Photograph: David Simcox/Royal Entomological Society The large blue butterfly has enjoyed its best summer for 150 years in Britain thanks to targeted restoration work, which is also benefiting other rare insects including the rugged oil beetle and the shrill carder bee. The butterfly, which became extinct in Britain in 1979 but was reintroduced via caterpillars from Sweden four years later, flew in its greatest numbers in June this year since records began. South-west England now supports the world’s greatest known concentration of large blues, which are listed as one of Europe’s most endangered insect species. Up to a third of its British population is found on 12 new sites which a conservation partnership has restored to f