Lord Howe Horn-headed Stick-insect

Cornicandovia australica is a large, flightless stick insect belonging to the family Diapheromeridae, distinguished by paired horn-like projections on the head that give the species its distinctive appearance. Like other phasmids, it relies on camouflage to avoid detection, resembling twigs or bark to evade predators, and is primarily nocturnal, feeding on foliage under cover of darkness. As a herbivorous insect, it likely contributes to nutrient cycling and serves as a prey item for birds and other invertebrate predators within its native ecosystem.

The species is endemic to Australia, restricted to a narrow terrestrial range associated with the Lord Howe Island group. It inhabits vegetated terrestrial habitats, sheltering among leaf litter, host plants, and rocky outcrops during daylight hours.

Its critically endangered status stems largely from the impact of invasive, non-native species, which have altered habitat conditions and introduced novel predation pressures unfamiliar to an insect adapted to an isolated island environment. Introduced rodents and other alien predators pose an ongoing threat to survival, particularly given the species' limited range and small, fragmented populations. Hunting and collection of specimens has also been recorded as a continuing pressure, compounding the risk from invasive species.

Conservation attention for Lord Howe Island's endemic invertebrates has increased in recent years, with island-wide invasive species management and biosecurity programs aimed at reducing predator pressure on native fauna. Population numbers for this species remain unknown, and monitoring data are limited.

Given its restricted distribution, ongoing invasive species pressure, and continued exploitation, the species' outlook remains precarious, with survival closely tied to the success of habitat protection and invasive predator control efforts.

This species inhabits specialized remnant habitats within Australia's fragmented landscape ecosystems. The habitat requirements are highly specific, making the species particularly sensitive to environmental modifications and land use changes.