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find out more... May Highflyer. Copyright: Stephen Rolls

Essex Field Club
Essex Field Club
registered charity
no 1113963
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We are normally open to the public at our centre at Wat Tyler Country Park every Saturday, Sunday and bank holiday between 11am and 4pm. We are also usually open on Wednesdays between 10am and 4pm.

Spring recording Record your Robin Record Common Frog Rana temporaria
Record Alexanders Smyrnium olusatrum Record Tawny Mining Bee Andrena fulva
Record Dark-edged Bee Fly Bombylius major
Record Spring Flower Bee Anthophora plumipes
Record cuckoo bee Melecta albifrons

Harlequin Ladybird

Harlequin Ladybird Harmonia axyridis - a potential ecological disaster in Britain?


by Paul Mabbott

Save your records for Harlequin Ladybird

Species account


harlequin ladybird Copyright: Chris Gibson
© Chris Gibson
We noted (Newsletter May, 2004) that "new" ladybirds were likely to be found in Britain and expressed concern about one species.  Harmonia axyridis (the multicoloured, multivariate, southern, Japanese, harlequin, hallowe'en, Asian ladybird,-beetle,-bug) was introduced into SE USA to control pest aphids: it is a very efficient at this but has some less fortunate properties.

Like most ladybirds it can reproduce at a prodigious rate so millions are regularly seen, often entering buildings and becoming a nuisance. It has spread throughout the USA and Canada.

Harmonia axyridis Copyright: Peter Harvey
© Peter Harvey
More significantly, it has a very wide prey range: if there are no aphids it will eat other insects including ladybirds. Most native ladybirds are 'cannibals' but, since species eat each other, there is a balance without net gain or loss between species.  Unfortunately, other ladybirds cannot eat H. axyridis because of its chemical defences; as a result native American species are in decline from both competition and predation. Other insects are also eaten including butterfly eggs: it is not only ladybirds which are threatened.

In its native ecosystem, H. axyridis is a harmless, helpful ladybird because its population level is controlled by predators and pathogens. These do not exist in America or Europe. To release the animal in America was foolish. Worse was to allow its use as a pest control in Europe: it is now established, particularly in Holland where it seems to be elbowing out local ladybirds. On the scale of continental America and Europe the species is a big problem: it could be a disaster if released onto a small island.

The first British record of the species has come from north Essex: Ian Wright found it in the garden of the White Lion at Sible Hedingham. It was hoped that this was an isolated vagrant, but within weeks mor ehave been found over the S.E., particularly in London. It is important that we look out for this beetle.  It is not possible to illustrate all the forms of H. axyridis (it is likely to be found in mixed groups). It may be red with between 0 and 19 black spots (small or large) but is commonly melanic, black with variable numbers of red spots. However, pattern is not too important since it is a relatively large species (7mms +), is somewhat rounded, with brown legs.  The only British red-black ladybirds of this size are the 7-spot and Eyed ladybirds which have black legs. Melanic variant native ladybirds of this size are extremely rare.

Don't confuse with the 7 Spot Ladybird
Coccinella septempunctata Copyright: Peter Harvey
© Peter Harvey
If you encounter any large black-red ladybirds which seem not to be 7-spot or eyed ladybirds, please send them all (dead or alive) to:
  • J. Bowdrey Curator of Natural History Colchester Museums, 14 Ryegate Road Colchester Essex CO1 1YG (Tel: 01206 282936)
  • Paul Mabbott, 49 Endowood Road, Sheffield S7 2LY
  • or to any other entomologist!

I have a web page which is regularly up-dated at:
http://www.ladybird-survey.pwp.blueyonder.co.uk/H_axyridis.htm link

My thanks to the late Michael Majerus for notification of this record and for other information.