Birds arrived. Gulls landed within weeks of the island's emergence, depositing the guano that built a richer soil. Fulmars and guillemots were the first to nest. Snow buntings and graylag geese came, almost ninety bird species in all, and twenty-one species of butterfly and moth. The first bush--a willow--came fifteen years after creation, and five years after the willows, seals were breeding on the young island. The descriptions make Surtsey sound like an orchestra, one instrument after another joining until there was the symphony that is an ecosystem.