Fiordland kiwi diaries: Saving Our Iconic Kiwi

Department of Conservation —  21/08/2017 — 7 Comments

We caught up with Tim, a ranger on the front lines of the Save Our Iconic Kiwi initiative.

I’m Tim, a kiwi ranger with DOC in Fiordland. My job is to manage a new project monitoring southern Fiordland tokoeka (kiwi) at Shy Lake, between Wet Jacket Arm and Breaksea Sound.

Tim and Myrtle - by Em Oyston.jpg

Tim and Myrtle. Photo: Em Oyston

A new injection of funding has come into kiwi conservation under the banner “Save Our Iconic Kiwi”. Kiwi populations around the country are declining at an average of about 2% a year – quite a serious situation. It’s mostly due to predation upon kiwi chicks by stoats, cats, dogs etc. The goal for Save Our Iconic Kiwi is to turn this decline around, so that every type of kiwi is increasing at 2% a year.

Southern fiordland tokoeka feathers - by Em Oyston.jpg

Southern tokoeka feathers. Photo: Em Oyston

Some populations are already doing this – for example, the Coromandel North Island brown kiwi, and the small but growing populations of Haast tokoeka and rowi on the West Coast. However there are still widespread, largely unmanaged populations, particularly in the South Island. In Fiordland, there is an extensive but dwindling population of southern and northern Fiordland tokoeka spread across maybe a million hectares of rugged terrain. Protecting thousands of birds over such a remote and rough area is a huge challenge. On this scale, and in this environment, we’re not going to be able to cover enough ground through trapping.  We think the best and most cost effective tool we currently have available is aerial 1080.

Shy Lake from near the bivvy site crop

Shy Lake. Tim/DOC

Aerial 1080 dropped every few years has been shown to increase the kiwi population at Tongariro in the North Island. However in South Island beech forests we may have to change the pest management regime to suit the different habits of Southern tokoeka and to match the frequency of stoat plagues. We know from projects like Battle for our Birds that aerial 1080 can reduce stoats to very low numbers. We also know that stoats can be at such low numbers that we can’t detect them on tracking cards, and yet still be killing kiwi chicks – the chicks are that vulnerable.

At Shy Lake, we’re setting up a new project to monitor the survival of kiwi chicks over the next five years or more. During this time we’ll distribute 1080 in the area and compare kiwi survival in years with and without 1080. There’s no direct risk to the kiwi from the 1080. If we find that aerial 1080 does allow the kiwi population to grow, then we’ll know that we’ve got a good tool to roll out across big areas of Fiordland. One little project on one peninsula isn’t going to do the job – we need to think big.

Study site - by Em Oyston.jpg

The study site. Photo: Em Oyston

The site at Shy Lake is very remote. We chose it partly because of that – it has never received any pest control before. Many of the areas bordering the road and lakes have received trapping or other pest control for years, and while this is great conservation, it muddies the waters scientifically in terms of predator dynamics. We wanted an area that represents the vast wilderness that is still untouched by conservation efforts, but holds thousands of kiwi. Shy Lake holds good densities of adult kiwi, and is a little less rugged than many other catchments in the area – in places at least. This makes it a workable site to run a project of this kind.

Having chosen the site, phase one for us is to catch some adult kiwi and attach radio transmitters to their legs.


This is the first post in a series about Tim’s work, follow the Conservation Blog to keep up to date on his progress. 

7 responses to Fiordland kiwi diaries: Saving Our Iconic Kiwi

  1. 

    Hello
    As a retired Wildlife Biologist I applaud your efforts in attempting to eliminate introduced predators in NZ. In my part of the world feral cats and dogs as well as Norway rats are a major problem for many of the local wildlife species. Good luck with your program and I sincerely hope you do realize your objectives.
    Cheers, John Mills
    Nova Scotia, Canada

  2. 
    Rory Hannan 30/08/2017 at 4:05 pm

    Good work Tim! You did a fantastic job with Kākāpō over the years. 👍

  3. 

    Hi – man what a job working with the kiwi – so rewarding. Just to let you know tried to click on link for Brunner Mine Site blog and it is broken. Cheers.

Trackbacks and Pingbacks:

  1. Fiordland Kiwi Diaries: Stoats and possums in nests « Conservation blog - December 13, 2017

    […] caught up with Tim, a ranger on the front lines of the Save Our Iconic Kiwi initiative. This is the seventh in a series following the work he’s doing to save the Fiordland tokoeka […]

  2. Fiordland Kiwi Diaries: Checking on this year’s chicks « Conservation blog - November 29, 2017

    […] caught up with Tim, a ranger on the front lines of the Save Our Iconic Kiwi initiative. This is the sixth in a series following the work he’s doing to save the Fiordland tokoeka […]

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