The first is of a Helipro Robinson R44 helicopter , ZK-IBJ, which was doing scenic rides for visitors. The next of a Cirrus SR22, ZK-YUG. This aircraft is privately owned and based here in Wellington.
The next picture is a Tecnam P2002 Sierra microlight, ZK-MVT, and is normally based at Wanaka. The last picture is from the back of Cessna 206, ZK-WWT during a couple of circuits. Before you ask, that's NOT me posing for the camera [and it's not the worst picture I got of you either Chris!] :-)