The adult in the above photos is the only one that has been seen in the park.
Classification
from Australian Faunal Directory
Order Hemiptera - bugs, hoppers and scale insects
Suborder Auchenorrhyncha - Cicadas, Hoppers, and Spittlebugs
Super-family Membracoidea - Leaf-hoppers and Tree-hoppers, 860 species in Australia
Family Cicadellidae - Leafhoppers and Gumtree hoppers, 784 named species in Australia
Genus ?
Species ?