Lulworth skipper caterpillars live in the warmest zone of a grass clump, at a height of . The pupal stage lasts for about two weeks, from the beginning of June onwards, until late July. It is formed inside a loose "nest" of silk and grass that is spun deep inside a tussock of tor grass. Imago begin to emerge in the early middle of July and finish emerging in the middle of September. Typically, they will live for five to ten days—the normal lifespan for a non-hibernating butterfly of the Lulworth's seasonal stage. They fly only in strong sunshine and tend to
SS Lulworth Hill War Medal for Bravery at Sea. In 1985 a radio interview was broadcast in which Cooke described their ordeal and survival. On 23 May 1943 "Leonardo da Vinci" was in the North Atlantic returning from patrol west of Vigo, Spain when the Royal Navy destroyer depth charged and sank her. There were no survivors. James Hull, the prisoner from "Lulworth Hill", had previously been transferred to the Italian submarine "Finzi". In 1947 Dorset Steamships bought the Empire ship SS "Empire Mandarin" and renamed her "Lulworth Hill". In 1949 she was renamed "Castle Hill". In 1950 she was transferred to a