Is there anybody out there…?
Down in deepest South Westland lives a kiwi called the Haast tokoeka. It was named for its oversized beak, and translated from Te Reo tokoeka means bird (weka) with a walking stick (toko).
Haast tokoeka kiwi footprints
Tokoeka are under attack from introduced predators, particularly stoats, so their home between the Arawata and Waiatoto rivers is protected, as the Haast Tokoeka Sanctuary. The Sanctuary has been blitzed with intensive stoat trapping since 2001.
Kath Morris scans for breeding pairs of kiwi
Dedicated Haast tokoeka kiwi rangers follow the lives and loves of about one hundred pairs of adult tokoeka wearing radio-transmitters on their legs. That way they can protect the young birds through BNZ funded Operation Nest Egg.
Haast tokoeka egg removed from the sanctuary for captive incubation
Haast tokoeka chick hatched at Willowbank Wildlife Reserve
The Sanctuary protects a stronghold of tokoeka in South Westland, but they are not alone in the world. Anecdotal accounts from hunters and locals led DOC to investigate further up the Arawata River and another population was found. Now the kiwi team wants to find and monitor more of these Sanctuary neighbours, so they can increase the gene pool for tokoeka conservation and extend their distribution in case of environmental disasters.
After all it’s better not to keep all your tokoeka eggs in one basket!
Instruments of detection
The extraordinary sensory perception of dogs’ shnozzes has been used for years to sniff out kiwi. Here in Haast our own Blair Hoult and kiwi-dog Tussock have found six new tokoeka together.
Blair & Tussock add a newly discovered tokoeka to the monitoring regime
Both these methods are very labour intensive and it is helpful to know if there are tokoeka about before sending in the rangers. DOC’s Research and Development Team have developed a new device for recording bird calls, which has the potential to find new tokoeka with minimal time in the field.
Trainee Ranger Chris Bowen recently set off to test this new technology in the wilds of South Westland.
To test the reliability of recorders in the field Chris and Blair pulled on their beanies at dusk for a cold night listening beside a recorder set high up in the alpine tussock of the Sanctuary. Analysing the acoustic recording back in the office Chris found that it had picked up 78% of the calls he and Blair heard sitting on the mountain.
Chris Bowen trials the new acoustic recorder
Next Chris used the recorders to search for new tokoeka outside the sanctuary. When he got them back in the office he was excited to find that one of the recorders had picked up a new pair serenading each other. Three days later Blair and contractor Chris Rickard headed into the same area with Chris’ kiwi dog. They caught and put a transmitter on a new adult female, which has been named Downpour Torrent after a nearby creek (it rains a lot here!).
Demonstrating that these recorders work well in the field is great news for managers trying to make savings. Whereas, staff time for one hundred hours of call listening costs DOC around $2000, an acoustic recorder will listen for one hundred hours for the price of four AA batteries.
The acoustic recorders are continuing to be trialled on various bird monitoring projects around New Zealand and will really improve efficiency. Technological advances in species monitoring free up valuable time and resources for DOC to protect more vulnerable species.
Hi there i was just wondering if you have found any kiwi in the Jackson and Martyr river area as i was collecting pounamu from the martyr river 9 months ago (with permision of course) and we camped the night at the martyr river just up stream from the bridge and we were lucky enough to hear a kiwi calling at night, then a few months latter i was camping at the road end by the martyr river and i herd another kiwi there to.
Thanks for letting us know about hearing kiwi in the Jackson & Mata. We welcome interesting observations from the public, which can improve our knowledge of species distribution. It is more than likely that there are isolated kiwi in the Jackson/Martyr area. There have been several reports over the years from around this area, and the kiwi team does plan to put out the acoustic recorders in order to verify if in fact kiwi are present.
Hey Blair! Great work – great to see Tussock there too!