Thanks Harvey. I did suspect Siphanta acuta or something similar but I wasn't certain. Happy to confirm based on the green planthopper you saw, as these nymphs match the description/photos available. Good have these photos on CNM for ID purposes. https://nzacfactsheets.landcareresearch.co.nz/factsheet/InterestingInsects/Green-planthopper---Siphanta-acuta.html http://www.padil.gov.au/maf-border/pest/main/141097