A helicopter that crashed in rural Mahia on Wednesday is believed to have struck wires prior to the incident.
The pilot, a 43-year-old man, was the only person on board the helicopter when it crashed shortly after 6am.
A Waikato District Health Board spokeswoman said the man in his 40s remains in a stable condition in the High Dependency Unit.
The Robinson 44 helicopter was carrying out agricultural work at the time of the crash, according to the Rescue Coordination Centre NZ.