The black-veined white butterfly is a large butterfly. It survives in much of Europe but it has been extinct in Great Britain since about 1925. It was a favourite of Sir Winston Churchill who tried to reintroduce the beautiful species to Southern England where it used to thrive in earlier times. He released colonies of Black veined whites in the large grounds of his home at Chartwell in Kent but they did not survive.
The adults are quite social and their abundance varies greatly from year to year. The flight period of the black-veined white is between April and July.