Princess Kate and Prince William have been alerted to a rising environmental health threat close to their Windsor residence, as an outbreak of oak processionary moth (OPM) caterpillars spreads through Windsor Great Park. The infestation is causing concern among local residents and royal watchers alike due to its potential health risks—particularly to children and pets.
The sprawling 4,800-acre Windsor Great Park, which borders the couple’s family home, Adelaide Cottage, has experienced a surge in the population of these invasive caterpillars. Windsor officials issued a public warning through the park’s website, explaining the danger posed by the caterpillars’ fine, toxic hairs. These hairs act as a natural defence mechanism and contain a substance that can cause skin rashes, eye irritations, and even respiratory problems in both humans and animals.
Originally introduced to Britain in 2005, the oak processionary moth was first detected in Windsor Great Park in 2018. Since then, the infestation has expanded during the warm season, with the months of May through July marking the most hazardous period for exposure. This year’s activity is notably high, prompting renewed caution near the royal family’s Windsor home.
The warning is especially relevant given the royal couple’s well-documented love for nature and outdoor life with their children—Prince George, Princess Charlotte, and Prince Louis. The royal children are frequently seen enjoying the open grounds of Windsor, making the timing of this outbreak particularly troubling.
Pet owners and walkers in the Windsor area have also been advised to exercise vigilance. Dogs should be kept on leads to prevent contact with the caterpillars, whose toxic hairs can be harmful if inhaled or ingested.
For Prince William and Princess Kate, whose family values are deeply rooted in the serene lifestyle offered by Windsor’s countryside, the infestation presents a direct challenge to their daily routine. Local authorities continue to monitor the situation and are working to control the spread of OPM caterpillars throughout Windsor Great Park to protect both residents and the royal family.