Urtica ferox, commonly known as ongaonga, is a nettle that is native & endemic to New Zealand. It's sting is so nasty that even the smallest brush will feel numb for days following the painful sting. People have been known to become unconscious and even die from this serious stinging nettle. Yet it's the only thing our native butterfly, the red admiral, will eat.
Red Admiral butterfly native to NZ. Similar to the yellow admiral except less common because the caterpillars only eat NZ native nettle which is nasty nasty stuff rarely seen in human modified landscapes.
There are plenty of plant species to choose from the create a no-mow lawn. Most of them are NZ natives because they grow better here than anything else. Blechnum penna-marina, Muehlenbeckia axillaris, Mazus novo zealandiae, Isotama fluviatilis, Selliera, Acaena species, Leptinella species, and Pratia angulata.