"The paradise the 49 permanent residents have inherited is a flawed one. Governor George Grey’s attempt to turn Kawau into a miniature Garden of Eden in the 19th century has created an out-of-balance ecosystem. Wallabies have chewed away most of the undergrowth, and imported pine trees dominate Kawau’s forest. A small population of kiwi survive, and weka are plentiful, but the many dogs, cats, rats and wallabies on the island mean it is not the Eden that Grey envisaged."

Flaws in Grey’s Garden of Eden - National - NZ Herald News

The problem with transforming habitats.