Swarms of biting Asian ladybirds invade British homes as the cold weather drives thousands indoors to hibernate

Harlequin ladybirds, an invasive species from Japan first recorded in Britain in 2004, are swarming into homes from Cornwall to the North East as autumn temperatures drop. One South Tyneside homeowner described being "absolutely inundated" with thousands covering his property. Experts say the insects cluster in large groups on south-facing walls before forcing their way inside to hibernate.

Unlike native ladybirds, harlequins can bite humans, leaving a red mark, and are noticeably larger than the familiar seven-spot species.

They pose a threat to native British ladybirds by eating their larvae and competing for food, with research suggesting several native species have declined since 2004.

John Whiteley-Wilkson of Acorn Environment Services says the swarms are seasonal behaviour, not infestation — but warns they are hard to stop once they find a warm spot.