"Unfortunately, Makea was proving difficult to medicate due to his unwillingness to eat," the spokesperson said.
After being advised of Makea's deteriorating condition Massey University sent a team of vets, support staff and specialist equipment.
A necropsy was carried out but the results were not available.
At 22-years-old Makea had exceeded the average life expectancy in the wild, which is 17 years.
Rufus died while being transferred to Massey University for a medical assessment after he had shown signs of being unwell.
Napier City Council manager of tourism services Neil Fergus was not available for comment yesterday.