Invasive species in New Zealand

[3] Almost without exception,[4][5] the introduced species have been detrimental to the native flora and fauna, but some, such as farmed sheep and cows and the clover upon which they feed, now form a large part of the economy of New Zealand.

Possibility of introduced herbivores (deer) to serve as ecological proxies for extinct moa has been questioned.

[13] They also manage a small number of species under the National Interest Pest Responses (NIPR) programme.

Biosecurity New Zealand manages a small number of weeds under the National Interest Pest Responses programme.

[14] Additionally, the Department of Conservation lists 328 vascular plant species as environmental weeds.