Ladybirds guide – Field Studies Council

British Ladybirds

Ladybirds should not be confused with the smaller, British Ladybird. Harlequins are a larger, aggressive non-native species from Asia which do some good stuff like eating plant destroying aphids but then they go and ruin it by attacking our native ladybirds which is why we class them as a pest.

They live in an upstairs sash window and huddle by the dozen in the corner of the ceiling. The Harlequins aren’t daft, it’s no surprise that they’ve made their home on a south-facing window above a radiator.

Harlequins snuggle down for the winter they release pheromones to signal to all their Harlequin mates to join them in the cozy crevices of the sash window. Very soon you are invaded. Harlequins will start to fly around the house, looking for their mates. They rest on the curtains, sofa, even a bare arm this is when you call the experts in, MIDS Pest Control will attend and deal with the issue for you.

Why Ladybugs can become an issue

Health problems:

These pests are not harmful to humans, they can bite but they won’t sting, however, there is a possibility to be allergic to ladybugs.

  • breathing issues
  • a stuffy nose
  • watery and swollen eyes

Although ladybugs will not seriously hurt you, they can cause property issues.

When ladybugs get stressed they release blood from their legs that cause an orange stain onto your:

  • furniture
  • walls
  • floors

Information from Healthline

What they eat:

Because the Harlequin ladybird feeds off of small insects that are also pests, they are seen as an asset to your garden.

However, this ladybird will also feed on many other insects, including small insects, eggs and larvae of butterflies and moths, and other small insects including other ladybirds.

The Harlequin ladybird is also having a negative impact on our wildlife as it out-competes our native ladybirds for food and eats their larvae and eggs.

Information from Wildlife trusts and The RHS

Warnings when using insecticides:

Be sure to take care when using insecticides, a few things you can do to reduce the risk to British Ladybirds include:

  • ventilating the area
  • keeping animals out of the treated area
  • using only the recommended amount of insecticide
  • mixing the insecticide outside
  • get rid of any unneeded insecticides

For more information and to book an appointment go to our website at


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