Aerial pest control to protect New Zealand’s rare native bats and other species is completed in the Eglinton valley in Fiordland National Park.

Date:  13 December 2014

Aerial pest control to protect New Zealand’s rare native bats and other species was completed in the Eglinton valley in Fiordland National Park yesterday. 

The Battle for our Birds aerial 1080 pest control over 10,300 hectares complements a grid of poison bait stations for rats and possums in the lower valley, where a trapping network also keeps stoats down.   

The operation will protect New Zealand’s most important mainland southern short-tailed bat population, as well as southern long-tailed bats, and birds such as mōhua/yellowhead and South Island kākā.  

Short-tailed bat.
Short-tailed bat

It will also protect rare native mistletoe species and tree fushia from being eaten by possums. 

DOC Fiordland Conservation Services Manager Lindsay Wilson said the poison bait stations had successfully reduced rats to very low levels over 4800 hectares in the lower, more accessible parts of the valley but numbers continued to climb outside this area. 

“In the higher steeper areas beech seed has caused rat numbers to rise to damaging levels.” 

“This is a nationally important area for bats and mōhua and we need to use all the tools we have available to knock down the rat plague and keep on top of pests.” 

The application of biodegradable 1080-laced cereal baits over the treatment area followed its application with non-toxic “pre-feed” bait two weeks ago. 

The operation followed stringent safety procedures and buffer zones were in place over the grassed valley flats, along the Milford Road, around campsites, public amenity areas and significant waterways.

Warning signs advising the public about the risks of the pesticide and poisoned carcasses are in place at entrance points to the treatment area.  

For more information on DOC’s Battle for our Birds pest control response see:

Background information

  • The Eglinton valley is ecologically important with a host of threatened native species such as long and short-tailed bats, mōhua, kākā and kākāriki, which are vulnerable to predation by rats, stoats and possums. 
  • Research during previous beech mast (seeding) events has shown aerial 1080 to be the most effective and efficient tool for quickly reducing predator numbers over large areas of difficult terrain. 
  • The Battle for our Birds pest control operation in the Eglinton area used the biodegradable poison 1080 laced in cereal baits which were sown at a rate of 1 kilogram per hectare using GPS-guided feeder systems. 
  • DOC will monitor the effects of the pest control operation in coming months including the knock-down of rats, possums and stoats, and the breeding success of bats, mōhua and other forest birds.           
  • The Eglinton operation is the last of 25 beech mast response aerial pest control operations this year over a total of more than 550,000 hectares of public conservation land in South Island beech forests.   
  • The 2014 Battle for our Birds beech-mast campaign is aimed at protecting the most at-risk populations of mōhua/yellowhead, kākāriki/parakeet, kiwi, whio/blue duck, kea, kākā, rock wren, giant land snails and native bats at sites across the South Island.


Fiona Oliphant, Media Advisor
Phone: +64 3 371 3743 or +64 27 470 1378

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