In The Future Eaters, Flannery was critical of the European settlers introducing non-native wild animals into Australia's ecosystem.
At the same time, he suggested that if one wanted to reproduce, in some parts of Australia, the ecosystems that existed there ca.
60,000 years ago (before the arrival of the humans on the continent), it may be necessary to introduce into Australia, in a thoughtful and careful way, some non-native species that would be the closest substitutes to the continent's lost megafauna.
In particular, the Komodo dragon can be brought into Australia as a replacement for its extinct relative, Megalania, "the largest goanna of all time".
The Tasmanian devil could also be allowed to re-settle the mainland Australia from its Tasmanian refuge area.

In The Eternal Frontier, Flannery made a proposal for what later became nicknamed "Pleistocene rewilding": restoring the ecosystems that existed in North America before the arrival of the Clovis people and the concomitant disappearance of the North American Pleistocene megafauna ca.
13,000.
He wonders if, in addition to the wolves that have been already re-introduced to Yellowstone National Park, ambush predators, such as jaguars and lions should be reintroduced there as well, in order to bring the number of elks under control.
Furthermore, the closest extant relatives of the species that became extinct around the Clovis period could be introduced to North America's nature reserves as well.
In particular, the Indian and African elephants could substitute, respectively, for the mammoth and the mastodon; the Chacoan Peccary, for its extinct cousin the flat-headed Peccary (Platygonus compressus).
Llamas and panthers, which still survive outside of the US, should too be brought back to that country.
In The Future Eaters, Flannery was critical of the European settlers introducing non-native wild animals into Australia's ecosystem. At the same time, he suggested that if one wanted to reproduce, in some parts of Australia, the ecosystems that existed there ca. 60,000 years ago (before the arrival of the humans on the continent), it may be necessary to introduce into Australia, in a thoughtful and careful way, some non-native species that would be the closest substitutes to the continent's lost megafauna. In particular, the Komodo dragon can be brought into Australia as a replacement for its extinct relative, Megalania, "the largest goanna of all time". The Tasmanian devil could also be allowed to re-settle the mainland Australia from its Tasmanian refuge area.
In The Eternal Frontier, Flannery made a proposal for what later became nicknamed "Pleistocene rewilding": restoring the ecosystems that existed in North America before the arrival of the Clovis people and the concomitant disappearance of the North American Pleistocene megafauna ca. 13,000. He wonders if, in addition to the wolves that have been already re-introduced to Yellowstone National Park, ambush predators, such as jaguars and lions should be reintroduced there as well, in order to bring the number of elks under control. Furthermore, the closest extant relatives of the species that became extinct around the Clovis period could be introduced to North America's nature reserves as well. In particular, the Indian and African elephants could substitute, respectively, for the mammoth and the mastodon; the Chacoan Peccary, for its extinct cousin the flat-headed Peccary (Platygonus compressus). Llamas and panthers, which still survive outside of the US, should too be brought back to that country.
Tim Flannery