You may have noticed it too—bright red bugs swarming beaches, gardens, and even your home. This summer, the UK experienced the largest ladybird infestation since 1976, with millions taking over coastal towns, parks, and residential areas.
But what caused this surge? Are ladybirds dangerous? And what can you do if they invade your home?
What’s Behind the 2025 Ladybird Surge?
According to pest experts and entomologists, three main factors contributed to this year’s ladybird boom:
- Record-breaking temperatures: The unusually warm and dry spring helped boost aphid numbers (their main food source).
- Extended breeding season: High temperatures allowed ladybirds to reproduce faster and in greater numbers.
- Low rainfall: Fewer storms meant more ladybirds survived and migrated freely.
Are Ladybirds Harmful?
Most UK ladybirds are harmless to humans and even beneficial for gardens, as they eat aphids. However, when they gather in large numbers or enter homes in search of warmth, they can become a nuisance.
Some invasive species, such as the Harlequin ladybird, can also pose a risk to native species and may bite, causing minor irritation.
What To Do If Ladybirds Invade Your Home
If you notice clusters of ladybirds gathering on your windows, walls, or ceilings, it’s best to take early action. Here’s what you can do:
- Seal entry points: Use silicone sealant to close gaps around windows, doors, and vents.
- Vacuum safely: Use a vacuum with a hose attachment to remove them gently—avoid squashing, as this can release a foul odour.
- Avoid chemical sprays: Ladybirds are beneficial insects. Where possible, use non-lethal removal methods.
- Call a professional: If you’re dealing with a large infestation, professional pest control can help manage the problem without harming beneficial insects.
Why Are They Swarming Coastal Areas?
Many sightings in 2025 were reported near the coast, especially on warm, still days. This is because ladybirds are strong fliers and are attracted to sun-exposed surfaces, such as sand, rocks, and buildings.
Some also arrive after being blown inland from continental Europe, particularly the Harlequin species, which migrate in large numbers.
Need Help with a Ladybird Infestation?
If you’ve spotted an unusual number of ladybirds in or around your home, Go2 Pest Control is here to help. Our team can identify whether the insects are a harmless seasonal surge or an invasive species that needs managing.
We use safe, eco-friendly methods to protect your home and the local environment.
Get in touch with us today for advice or to arrange an inspection.
Summary: Ladybird Infestation UK – Key Facts
- 2025 has seen the biggest UK ladybird swarm since 1976
- Hot weather, more aphids, and low rainfall are to blame
- Most ladybirds are harmless, but large numbers can be a problem
- Seal entry points, avoid chemicals, and contact professionals if needed