New Zealand Cutworm

Fascinating facts about the New Zealand Cutworm

• According to a 2017 study, the New Zealand Cutworm has around 1,440 taste hairs on its body, which is more than double the number found on similar species, allowing it to detect even the slightest changes in its environment.
• New Zealand Cutworm caterpillars can eat up to 90% of a wheat plant's leaves in a single night, with some studies showing they can consume as much as 40mg of plant material per hour, making them a significant pest in agricultural fields.
• The New Zealand Cutworm's lifecycle is highly dependent on temperature, with caterpillars developing faster in warmer conditions - at 20°C they can reach adulthood in just 35 days, but at 10°C this process takes over 100 days.
• Adult New Zealand Cutworm moths are nocturnal and have a highly sensitive sense of smell, with some research suggesting they can detect pheromones from over 1.5km away, allowing them to locate potential mates with accuracy.
• A single New Zealand Cutworm female can lay up to 2,000 eggs in her lifetime, which typically spans around 2 weeks, making her one of the most prolific egg-layers among similar moth species, and contributing to the species' ability to quickly colonize new areas.

At a glance

About the New Zealand Cutworm

The New Zealand cutworm, scientifically known as Ichneutica mutans, is a striking nocturnal moth that captivates both researchers and enthusiasts alike. Characterized by its rich brown and grey forewings, which are adorned with intricate patterns reminiscent of the rugged New Zealand landscape, this species is a master of camouflage. The hindwings, a softer shade of beige, contrast with the forewings, revealing a delicate beauty when in flight. Typically found in open grasslands, scrublands, and along coastal areas, the cutworm thrives in a variety of habitats, from the lush native bush to the windswept dunes. Its behavior is equally intriguing; the moth is primarily active at night, where it flits between flowers, drawn to the nectar of native plants, showcasing a pivotal role in the local ecosystem as a pollinator. The larvae, however, are notorious for their voracious appetite, feeding primarily on the leaves of various grasses and herbaceous plants, which can lead to localized defoliation in some regions. Surprisingly, the New Zealand cutworm exhibits a unique defense mechanism—when threatened, it can produce a foul-smelling secretion that deters potential predators, a remarkable adaptation in a world where survival often hinges on evasion rather than confrontation.

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