Thursday, June 20, 2024

Season’s first tokoeka chick hatches

The first Haast tokoeka chick of the 2022-23 season has hatched with Te Rūnanga o Makaawhio naming it Inanga, the Department of Conservation (DOC) has announced.

Haast tokoeka are one of the nation’s rarest kiwi with a population of about 550 birds. The chick was born earlier this month in the Haast Kiwi Sanctuary.

The Department actively manages the areas where Haast tokoeka live. This includes running trap lines across 12,000 ha of land to kill stoats, which are the main cause of death for chicks.

During monitoring trips earlier this year 34 additional birds were caught, fitted with transmitters and released in the Sanctuary, Olivine Range and Junction Hill. 

Inanga’s’ father was among them. He was found in the Waiatoto River area which lies within the Sanctuary

DOC Senior Ranger Biodiversity, Tracey Dearlove says three of the birds caught in the sanctuary were juveniles.

“Their weights indicate that one was from last season and two from the season before. That’s a good sign predator control is working,” she said.

Ms Dearlove says more than 20 years of work has gone into getting the tokoeka population to where it is today.

“Since 2018, the emphasis has been on managing Haast tokoeka at place through trapping and periodic use of aerial predator control on a landscape scale.”

“Last year the tokoeka population threat level was downgraded to Threatened – Nationally Vulnerable from Nationally Critical due to a combination of successful conservation management and discovery of a new population at Junction Hill.”

She said some egg and chick removal for captive rearing and transfer to predator free islands (ONE) continues in unmanaged sites to ensure that maximum genetic diversity of Haast tokoeka is retained. 

“The key factor driving the population of Haast tokoeka is the very high rate of adult survival with a remarkable average life expectancy of 61 years. Tokoeka are also naturally slow breeders. 

“Adult survivorship is very important as the death of any adult puts big pressure on the population. Dogs and ferrets are the biggest threat to adult kiwi so it’s vital to minimise that risk,” said Ms Dearlove.

Much of the work was carried out with Save our Iconic Kiwi funding.

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