In April 2019, disaster struck the kākāpō population.
There was an outbreak of the deadly fungal disease aspergillosis, which would eventually kill two adult females and seven chicks.
But against expectations, veterinary experts were able to nurse many birds back to health.
Join Alison Ballance for part 7 of an audio adventure as the rollercoaster ride of the 2019 kākāpō breeding season hits rock bottom.
If you would like to know more about kākāpō you can follow the Kākāpō Recovery Programme on Facebook and Instagram. Kākāpō scientist Andrew Digby is on Twitter. Or check out the book Kākāpō - rescued from the brink of extinction by Alison Ballance.