A small, grey moth with a shimmering, copper-coloured eye at the tip of each forewing. The adults are discreet and rarely seen, hiding in the canopy during the day and flying only at dusk. They do not feed. They have no functional mouthparts. Their entire adult existence, just two to four weeks, is dedicated to one purpose: reproduction. The female lands on a developing apple, pear or walnut in the evening. She walks across the surface, tapping with her antennae, searching for the right spot. Once satisfied, she lays a single tiny egg on the skin. Within days, the egg hatches, and the larva immediately bores into the fruit. It heads straight for the core, tunnelling through flesh to reach the nutrient-dense seeds. Inside the fruit, the larva is safe from predators and pesticides. It feeds and grows, moulting through five stages over three to four weeks. It avoids the surface, leaving the skin intact so the fruit continues to ripen. The apple looks perfect from the outside, but the inside is already ruined. This selective focus has made the codling moth one of the most successful specialists in the agricultural world. When the larva is fully grown, it chews an exit hole and drops to the ground. It spins a silk cocoon under bark or in leaf litter, transforming into a pupa. Depending on the season, it may emerge as an adult in a few weeks or wait through winter in diapause, a suspended state of development triggered by shorter days and cooler temperatures. In New Zealand, the codling moth arrived accidentally from Europe, hidden in imported fruit or nursery stock. It quickly became the most serious pest of apples, causing millions of dollars in damage each year. Orchardists responded with frequent insecticide sprays, but the moths developed resistance. Today, integrated pest management uses pheromone traps to confuse males, biological controls like parasitic wasps, and targeted sprays only when necessary.