This is a "black" one I haven't seen before. That makes it number 6.
Probably a Marlborough grass skink rather the Waiharakeke grass skink. Common in dry sunny shrubland. Many had tails that were re-growing so must be under attack regularly.
after like a decade of taking photos of wildlife finally spotted one in the wild. Obviously wasn't impressed with the macro lens in its face. I've been gaped at before (https://inaturalist.nz/observations/122272215) but the lunging and barking is quite something.
Hitched a ride from Fiji in daughters luggage. Have contacted MPI