Don't count your kākāpō chicks until they hatch, kākāpō leaky homes and lots more kākāpō sex, all in episode 4 of the Kākāpō Files.

The 2019 kākāpō breeding season continues at breakneck speed.

Nineteen of 21 females on Anchor Island have mated and are starting to nest.

Down on Whenua Hou/Codfish Island, the action is also hotting up - but there is some disappointing news from Pearl's nest.

In episode four of the Kākāpō Files, we find out the truth behind the old saying 'don't count your eggs until they hatch', and we hear about leaky homes when it comes to kākāpō nests.

Kākāpō ranger Brodie Philp and kākāpō technical advisor Daryl Eason have just returned from Anchor Island and we catch up with them for all the latest news.

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