How scientists pulled off a rare kākāpō artificial insemination

Publicly released:
New Zealand; International
Semen collection in kākāpō using abdominal massage technique. Image from study by Fischer et al. (censored by SMC NZ)
Semen collection in kākāpō using abdominal massage technique. Image from study by Fischer et al. (censored by SMC NZ)

New Zealand's beloved kākāpō haven't made it easy for their population to bounce back from incredibly low numbers in the 1990s. One in five males don't father any offspring, only about two in five eggs hatch, and human intervention is so difficult that in 2019 New Zealand's Department of Conservation called in a team of parrot insemination experts from Germany to help. A new study from that team goes into excruciating detail about their efforts, including the... uh… 'squeezing', 'abdominal massage', and 'electric stimulation' techniques they used to collect kākāpō sperm. After the procedure, the poor male birds were 'rewarded with a nut'. Since the first kākāpō artificial insemination in 2009, there have been as many failures as successes - but a local scientist says these new methods will hopefully help change that.

Expert Reaction

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Dr Andrew Digby, Science Advisor Kākāpō/Takahē, Department of Conservation; and co-author of this research

Two of the main challenges facing the critically endangered kākāpō are low productivity (only about 40% of eggs hatch) and high levels of genetic inbreeding.

Artificial insemination is an important tool to tackle these issues, since it helps improve fertility and enables preservation of important genetic diversity from individuals which don’t mate naturally.

But artificial insemination is difficult: although the Kākāpō Team and collaborators were first successful in 2009 (a world first for a wild bird species), it has taken another ten years to repeat the feat.

In 2019 the Kākāpō Team and a team of parrot insemination experts from Germany successfully used artificial insemination to improve fertility and to produce four chicks from three females.

These included offspring from two males which had previously not produced, including one with rare and valuable “Fiordland” genes.

Crucially, this work has provided methods to enable artificial insemination to be used to benefit kākāpō conservation into the future.

Following on from further successful attempts in 2022, the Kākāpō Team will be again using artificial insemination in an upcoming breeding season in 2026, to help improve fertility and preserve genetic diversity from founder kākāpō which are poorly represented in the population.

Last updated:  16 May 2025 12:22pm
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Declared conflicts of interest Dr Digby is a co-author on this research.

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Research PLOS, Web page Open access
Journal/
conference:
PLOS One
Research:Paper
Organisation/s: Department of Conservation, University of Otago, Justus Liebig University Giessen, Germany
Funder: 1. DE, DV, KRT, AD: Financial and logistical support by the Department of Conservation 2. DF: EAAV Research Grant of the European Association of Avian Veterinarians 3. FR & BCR: Project “Genomics for Production & Security in a Biological Economy” funded by the New Zealand Ministry for Business, Innovation and Employment. 4. BCR: University of Otago Performance-Based Research Fund (PBRF) to support the genetic analyses of kākāpō parentage. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
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