Guardian: Butterflies are full of surprises and this year they have saved their biggest until last: in the midst of an awful November, subtropical butterflies have been spotted on Englands south coast. The remarkable appearance of the long-tailed blue, a butterfly happiest in the heat of Africa or Australia, raises a mystery: will these insects simply die this winter?
Until recently, the long-tailed blue, or Lampides boeticus, very occasionally arrived in hot summers: notably in 1945, and 1990 when it...