One day last summer, Jake Fiennes was lost in a cloud of butterflies. He was on a woodland path near Holkham Beach, on the north coast of Norfolk. Every decade or so, ten million painted-lady butterflies, which are orange, black, and white, migrate to Britain from tropical Africa. The hot summer meant that it was a bumper year for native species, too, and the painted ladies mingled with red admirals, peacocks, and common blues, feeding on bushes set back a few yards from the path. “Just sat in a haze of flittering, fluttering butterflies,” Fiennes told me later. “I was in awe. These flowers were just exploding.”
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