Monteith's Leaf Insect. Every year I see 2-3 of these wonderful insects. The Leaf Insects are related to Stick Insects. This is the only known Phyllium in Australia. There is a related leaf insect, Nanophyllium pygmaeum Redtenbacher, that lives in the vicinity of Iron Range north Queensland. Leaf insects are found broadly in the Old World tropics. They are kept as pets by members of the Phasmid Study Group where you can find all sorts of information on the care of stick insects in captivity.
Monteith's Leaf Insect is known only from males. The girls must be up there but only a photo of one taken in the Cairns Botanic Gardens is all we know of them. Leaf insects always have the tendency to move upwards. They seem to be at home in tree tops, so when one like this comes to the lights, it does not stay for long. Females of other species are often bulky and seem incapable of flight. So it is not surprising to not have seen one of this species. But it will happen some day; perhaps, during a storm or after a cyclone, one will happen along. This insect would make a great display in an insect zoo.