Sea Island was a golden-egg goose, a place where well-heeled families returned generation after generation, where dinner required tuxedos two nights a week, and the grounds were dotted with ceremonial oaks planted by presidents, royals and prime ministers.

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Colonies gather far inland after long treks across sea ice, where the females lay just one egg that is tended by the male.

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Lobstermen also notch the tails of egg-bearing females, and return them to sea to join the protected brood stock.

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