Why do so few people know about the Harlequin Ladybird (aka the Multicoloured Asian Ladybird in the USA)...?

Question

...and why is noone overtly concerned about the biodiversity implications of this interloper into USA and UK habitats?

It was introduced in droves as chemical-free pest control before anyone realised the devastating effect it would have on the indigenous species and, owing to climate change and late rectification of the problem, is now taking over native species in both America and Europe.  

Can you help stop it spreading and wiping out our lovely native coccinellae by keeping an eye open for them in your area and reporting them on:
http://www.harlequin-survey.org/

lightening rod · Accepted Answer

Silver,  I think you may be fighting a lost cause.  Where I am in the US most of the native ladybugs are already mostly gone.  The Asian beetles don't kill them but they are "bully" insects and they chase the native ladybugs off "their" plants--the result being most starve or at least do not thrive.  The Asian variety is a stronger breeder, more voracious, and they can overwinter very successfully.  In short they are perfect for this new environment and without predators or many diseases.  I hope I'm wrong but I see them being the dominant ladybug in North America in a few more years.

Tim C · Answer

We do care in Ireland.  As far as I know none have been found here.  Personally I keep a look out for them.

There are plenty other invasive species (both insect and plant) that can also be equally devestating.  The Newzealand Flatworm is one example, and Japanese Knotweed another.

Whether anything will be done though is another matter as these species are not reportable.

chillipope · Answer

I'm a ladybird spotter in the UK and have not seen this variety at this time, nor my contacts.  Thanks for the heads-up though

Why do so few people know about the Harlequin Ladybird (aka the Multicoloured Asian Ladybird in the USA)...?

3 Answers