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Harlequin Ladybirds Swarm Into UK Homes as Autumn Shelter Search Begins

Experts say the non-native harlequin beetles are seeking winter shelter in buildings as mild October weather keeps them active.

Overview

  • Residents across the country report rooms and windowsills covered in ladybirds, with social media videos showing houses "crawling with them" and some noting the insects can bite.
  • Entomologists explain the beetles are entering diapause and are drawn to sheltered crevices, often getting in through open doors, windows and gaps around loose-fitting frames.
  • The influx is largely attributed to harlequin ladybirds, a species introduced in the UK that has spread beyond the south-east into the Midlands.
  • Specialists note harlequins can carry a fungal infection described as sexually transmitted among ladybirds, but they emphasize it does not infect humans.
  • Advice circulating in consumer coverage suggests using strong scents such as cloves, lemons, limes or bay leaves near entry points to deter the insects.