As I inferred - this was a simple one.
The object was the mirror on the side of the Aerospatiale SA365N Dauphin 2 ZK-HYX2 of Rick Lucas Helicopters (Helipro).
Photographs taken at Paraparaumu on 10-12-2006.
This helicopter joined the NZ Civil register on 20-09-2004 and was cancelled on 16-11-2007 as exported to Rumania.
Well done anonymous.