net-winged beetle with flame-patterned wing cases
- Size
- Length: 1–2 cm
- Lifespan
- 1–2 years
- Diet
- Larvae feed on wood-boring beetle larvae under bark. Adults feed on nectar and pollen from flowers. Both larvae and adults are brightly coloured to warn predators of toxicity.
- Habitat
- Damp, shaded margins of native forests and scrublands. The daytime wanderers of the bush, often seen resting on upper surface of leaves or visiting flowers.
- Range
- Throughout North and South Islands in native forests and scrublands. Most common in lowland forested regions with abundant dead wood for larval development and diverse flowering plants for adult feeding.
- Endemism
- Native
- Main Threats
- Habitat loss from forest clearance and removal of dead wood. Pesticide use in gardens and forestry which kills larvae and adults. Collection by insect collectors due to attractive bright colours.
- Population
- New Zealand has several native species of net-winged beetle. Distinctive but often overlooked because they move slowly and rely on warning colors rather than speed to survive.
- Conservation Status
- Not Threatened
Intricate stained-glass architecture of the forest understory. A beetle that is beautiful and toxic.
The net-winged beetle is a master of honest advertising. Their anatomy is defined by soft, flexible elytra patterned with a complex net of raised longitudinal and transverse ridges, giving them a delicate, almost skeletal appearance. A beetle that looks like stained glass.
These net-winged sentinels utilise striking aposematic colouration, typically vibrant orange and black, to signal their chemical complexity to potential predators. Loaded with bitter, toxic compounds, they move with a slow, confident grace, needing no speed or camouflage because their very silhouette serves as a biological shield of bad taste. A beetle that is slow because it can afford to be.
This safe passage strategy represents a state of visual integrity, where survival is determined by what a creature contains rather than how fast it can run. The life cycle is a definitive sign of shrubbery complexity, with adults primarily functioning as nectar-feeders while the larvae act as undercover operators within the leaf litter and rotting wood.
These specialised larvae are thought to subsist on fungi or soft-bodied organisms, representing the hidden industry that occurs beneath the forest floor. They embody the idea that even the softest residents of the New Zealand bush can possess formidable horizontal defences through the mastery of internal chemistry.
Their presence indicates a healthy, chemically diverse environment where the stained-glass patterns of the beetle are a reliable marker of ecological stability. Not threatened, net-winged beetles are essential participants in the energy cycles of forest margins and damp gullies.
The adults are short-lived, emerging in summer to mate and lay eggs. The forest understory is green. The net-winged beetle crawls across a sun-drenched leaf, orange and black, stained-glass wings. It does not need to run. It is toxic. It does not know it is a sentinel. It does not know it is honest advertising.
It just wants to eat nectar. To encounter a net-winged beetle as it crawls openly across a leaf is to witness a survivor that has mastered the art of honest advertising. The beetle is proof.