Te Ao Mahinā at Wellington's Zoo, which houses kiwi, will remain empty until next year after three of its birds died in the space of two months.
A kiwi health expert investigated the three deaths but the post mortem results didn't indicate a clear cause.
A Wellington Zoo spokesperson told Newshub clinical similarities in the three birds were coincidental and didn't point to a common cause of illness.
"All three kiwi were found to have ulcers in their stomachs, but the post-mortems did not indicate a common cause."
Ulcers are not uncommon in Kiwi.
The post-mortem also revealed the kiwi had Pneumociniosis a lung disease caused by inhalation of dust.
"Pneumoconiosis was also present in all three birds; however, this condition is found in the majority of Kiwi in human care." The spokesperson said.
The investigation failed to find a clear link between the environment and the cause of illness for the three Kiwis.
The first kiwi, Fizzy died at the beginning of March, Jack White died on the May 20th and Tahi the Kiwi with one leg died on the 23rd.
Te Ao Mahinā will receive a refresh while the enclosure is empty, until the Zoo homes new Kiwis late next year.
