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May 15, 2019 37 mins

A spate of kākāpō chicks deaths from a fungal pneumonia caused by aspergillosis has DOC's Kākāpō Recovery Team very worried. Two further adult deaths bring the population to 144 birds with 73 living chicks, all in episode 18 of the Kākāpō Files.

The fungal disease aspergillosis has caused the deaths of three kākāpō chicks in the past week. This is in addition to an adult kākāpō which died from the same disease just over two weeks ago.

The fearsome fungus has the Department of Conservation's Kākāpō Recovery Team and wildlife vets around the world scrambling to understand what is causing the outbreak, which is unprecedented for the rare parrot.

A further chick and two adult males have also died from other causes in the past fortnight, dropping the kākāpō population to 144 adults and 73 living chicks.

Five kākāpō are currently at Auckland Zoo for investigation and treatment for possible aspergillosis. These include the adult female Weheruatanga-o-te-po and the chick Awarua-3-A.

Auckland Zoo vets carried out CT scans on four of these birds yesterday and are currently waiting for a veterinary radiology specialist in the United States to read the scans.

Auckland Zoo vet Dr James Chatterton, from the New Zealand Centre for Conservation Medicine, says that spores of the aspergillus fungus are ubiquitous in the environment, and only become a problem in stressed and immunocompromised animals.

However, the number of chicks succumbing to the disease after sharing a nest with other infected birds is causing alarm amongst wildlife vets and the Kākāpō Conservation team.

The problem is confined to Whenua Hou Island. There were initial concerns that artificial nest boxes might be contributing to the problem, but it is most prevalent in natural nest cavities.

The adult female Hoki was the first kākāpō to succumb to the disease. Since then, three chicks have also died from aspergillosis: Bella-2-A, Tumeke-4-A and Queenie-4-A.

Daryl Eason says all three chicks "were looking very good until very close to death, and they've all died from aspergillosis."

Aspergillosis is a very difficult disease to treat, says James Chatterton.

"One of the many frustrating problems when we're dealing with fungal infections in birds, is that often by the time the bird shows that it's sick, so by the time it looks lethargic and it's got breathing problems, often by then it's far too late to actually cure it," says James.

"And diagnosing it before the bird looks sick is extremely difficult."

Chick Waikawa-4-B also died this week, and Daryl says her death was not due to aspergillosis and "was an absolute mystery."…

Go to this episode on rnz.co.nz for more details

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