Whereas adult Lord Howe Island stick insects are typically nocturnal (1) (2) (4) (5), juveniles of this species tend to be active by day (2) (5). As with all other stick insects, the Lord Howe Island stick insect is a herbivorous species (5). It has been recorded feeding on a variety of plants (5), although on Ball’s Pyramid it is only known to feed on the leaf tips of one species of shrub, Melaleuca howeana (2) (4) (5). In captivity, adult Lord Howe Island stick insects feed on tree lucerne (Cytisus proliferus) and fig species, but juveniles tend to eat bramble (5).
Interestingly, as well as reproducing sexually, the Lord Howe Island stick insect is thought to be able to reproduce asexually (3) by parthenogenesis, whereby unfertilised eggs hatch into females (2). Mating in this species is reported to occur up to 3 times per night and may take up to 20 minutes each time (5). The female Lord Howe Island stick insect lays batches of eggs in the soil and buries them using the underside of her abdomen (2) (3) (5). Each batch typically contains about ten eggs (5), which are beige and patterned with raised, reticulated markings (2). Batches are laid at intervals of about 7 to 10 days (5), and each female Lord Howe Island stick insect can produce up to 300 eggs during its lifetime (3).
Young Lord Howe Island stick insects moult as they grow, eventually getting darker and becoming an adult at about seven months of age (5). The lifespan of the Lord Howe Island stick insect is thought to be about 12 to 18 months (3).