New Zealand is both a field site and a time capsule in Frank’s account of Oceania: its isolated islands shelter the tuatara, a living representative of an ancient reptile lineage, while their ecological histories reveal how readily human intervention can unsettle island life. The country’s significance lies in that double perspective. Its living species make evolutionary deep time tangible; its changing habitats expose the fragility of the systems that have endured there.

Islands, isolation, and ecological change

Frank’s two-month Pacific expedition was devoted to the effects of imported plant and animal species on ecological balance, and New Zealand forms part of the wider island setting through which he considers that question. Island ecosystems had maintained rich populations of endemic plants and animals in relative isolation. But the arrival of ships also brought rats, mice, and insects, followed by deliberate introductions intended to control the first arrivals or to protect agriculture. Cane toads and cats, for example, could become pests in their own right, prompting further introductions of predators. Those measures produced cascading consequences for birds and native reptiles rather than restoring a stable balance.

The ecological pressure was not confined to imported animals. Frank also identifies deforestation and the imprudent exploitation of plantations as causes of soil erosion and the destruction of traditional habitats. He links these forces to the unusually high proportion of threatened animal species in Oceania relative to its area and population. New Zealand matters within this argument not as an untouched ideal, but as one of the isolated island settings where the consequences of ecological change can be studied against a long history of distinct native life.

The tuatara and evolutionary deep time

The tuatara is the account’s most vivid connection between New Zealand and the ancient past. It occurs on some of the country’s isolated islands, where it lives in underground burrows, often sharing them with petrels. It can grow to 70 centimetres, has a remarkably low body temperature of nine degrees, and may live for more than a century. These details make the animal’s antiquity bodily and measurable: it is not merely a fossil described in a book, but a living creature encountered in its habitat.

Frank sees a tuatara moving among remnants of old forest and experiences the encounter as almost religious. At night, the animal seems to bring the Jurassic close, evoking a world in which the great dinosaurs had only begun to develop. The tuatara belongs to the rhynchocephalian reptiles, once a small but resilient group distinct from other reptile families. It is their only living representative, and has remained spectacularly unchanged for roughly 200 million years. Frank calls it a living fossil, while adding the qualification that such survival lasts only “for now.”

The tuatara’s presence in New Zealand also reshapes the meaning of fieldwork for Frank. He prefers to study living species in person before turning to other scientists’ monographs and systematic analyses. For him, the animal cannot be separated from the habitat that has endured alongside it: in the case of the tuatara and other old endemic species, the biotope itself has been preserved with astonishing continuity. Flying from island to island above turquoise coral reefs, he feels like a modern Darwin—not because the islands offer a static museum, but because direct observation lets him encounter evolution as a living process.

Gondwana and the wider pattern of survival

New Zealand’s evolutionary importance is also geographical. Frank connects its ancient fauna to Gondwana, the former continental landmass that included Fiji, Australia, India, and other regions before it fragmented. The tuatara’s survival is one strand in this larger history of old lineages and changing continents. Its presence makes the separated islands legible as remnants of a much older world.

Frank compares the force of seeing a tuatara with the hypothetical discovery of a living Archaeopteryx on an isolated island. The comparison leads to a documented example of another supposedly vanished animal: on 22 December 1938, a fishing boat off eastern South Africa caught a coelacanth in its nets. Until then, the lobe-finned fish, important to the evolution of terrestrial vertebrates, had been known only from fossils and was believed to have died out nearly 100 million years earlier. Like the tuatara, the coelacanth unsettles the boundary between an extinct past and the present. Frank stresses that the tuatara was once widespread across New Zealand, so its survival on isolated islands is not proof that its future is secure.

Ecological meaning and narrative role

New Zealand’s islands support two complementary ways of reading the past. Fossils disclose vanished forms, while surviving animals reveal that evolutionary history has not ended: an ancient lineage can persist in a living body, although persistence is not permanence. Frank’s preference for field observation gives that idea a concrete setting. The tuatara’s low body temperature, longevity, burrows, and forest habitat make deep time visible without turning the animal into an abstract scientific emblem.

At the same time, the account resists treating island nature as invulnerable. The broader Pacific discussion traces how introductions made to solve one ecological problem can create another, and how plantation exploitation and habitat loss compound the damage. New Zealand’s isolated fauna therefore signifies both resilience and exposure. The tuatara can seem to carry the Jurassic into the present, but its survival depends on a living habitat—and, as Frank’s warning about the limits of ecological repair implies, ancient continuity can be broken far more quickly than it was made.