Pest Removal


We are only months away from realising our vision to see native wildlife restored to the region in a protected sanctuary. In order to allow rare NZ native wildlife to be reintroduced and then thrive within the sanctuary, introduced pest mammals need to be removed. more

Pest removal will be achieved by using brodifacoum, a toxin specifically designed for this purpose and found in widely-used rodent control products available for purchase at most NZ supermarkets and home improvement stores. Aerial application of brodifacoum is the only method currently available to effectively remove all the pest mammals from a site the size and ruggedness of the Brook Waimarama Sanctuary.

The brodifacoum bait is specifically designed to target rodents and will be ignored by most native bird species as it does not resemble a food source to them. Brodifacoum has extremely low water solubility and therefore is not a threat to the Brook Stream’s water quality and people and pets living downstream.

We are taking every precaution to ensure a safe and effective pest removal process for neighbouring residents, Trust personnel and the contractors performing the bait application. We are following the lead of sanctuaries across New Zealand that have conducted similar best practice pest removal operations to create successful protected wildlife sanctuaries where removing pests has led to a long-term recovery of indigenous species and ecosystems.

In our planning for a successful operation we are also preparing for all contingencies and following all applicable regulations and codes of practice. The aerial application of brodifacoum within a pest-proof fence is a permitted activity. BWST is following the guidelines for this operation provided by the New Zealand Food Safety Authority, the brodifacoum Code of Practice, the Hazardous Substances and New Organisms Act, and has contracted leading consultants and operators experienced in aerial brodifacoum bait applications.

Brodifacoum has been used successfully in rodent removal programmes on New Zealand’s offshore islands, including Maud Island in the Marlborough Sounds, up to the size of Campbell Island (11,200 ha) and within all the large fenced mainland sites, including: Maungatautari (3,400 ha, Waikato), Tawharanui (588 ha), and Shakespear Regional Parks (c.500 ha) (Auckland), Orokonui (300 ha, Otago), Zealandia (225 ha, Wellington), Rotokare (230 ha, Taranaki), and Kaipupu Point (40 ha, Picton).

Pest Removal and Brodifacoum Factsheet