Kakapo numbers are likely to decrease this year after the death of the third endangered bird since September.
Male kakapo Waynebo was found dead by rangers on January 2 after his transmitter went into mortality mode.
Kakapo Recovery programme manager Deidre Vercoe Scott said the cause of Waynebo's death was unknown and tissue samples had been sent to Massey University.
"An autopsy has been carried out at Auckland Zoo and, at this stage, the only indication of the cause of death is that he had a wound on his chest."
"He had been completely healthy when routinely captured several weeks prior to his death."
There are now 128 kakapo left - up from 49 in the past 21 years - but there was unlikely to be any breeding this year.
A poor crop of rimu fruit, which make up the bulk of the kakapo's diet, meant there was little chance of breeding on Codfish Island and only a low chance on Anchor Island, she said.
"The good news is more than half the kakapo population consists of young breeding age birds, so the recovery of kakapo is still in good shape."
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