Roy, H.E.; Brown, P.M.J.; Harrower, C.; Dean, H.J.; Rorke, S.L.; Roy, D.B.

Harmonia axyridis invasion: UK distribution data 2004-2016

The dataset consists of location records of the Harlequin ladybird (Harmonia axyridis) in the UK. The records span from 2004 to 2016 with three records from 2003. Records were collected from several sources with the majority coming from online recording via the Harlequin Ladybird Survey website, the UK Ladybird Survey website and the iRecord Ladybird app. Other records have come from coleopterists and from a data call for the most recent ladybird atlas (e.g. local record centres, natural history societies, county Coleoptera recorders). The records include location, date and vice county, as well as life stage and colour form where available. The arrival of the Harlequin ladybird has provided a unique opportunity to study the spread of an invasive animal from the start of the invasion process. The advancements in modern technology, in particular the internet, has also provided new opportunities for recording and has enabled engagement with a far wider audience than was previously possible. This has allowed the ladybird surveys to deal efficiently with large volumes of data and verify and validate submitted records quickly. The data authors are extremely grateful to the many thousands of people across Britain who have contributed their ladybird findings to the UK Ladybird Survey.

Publication date: 2017-05-04

Get the data

This dataset is made available under the terms of the Open Government Licence

Format of the dataset : Tab delimited text file

You must cite: Roy, H.E.; Brown, P.M.J.; Harrower, C.; Dean, H.J.; Rorke, S.L.; Roy, D.B. (2017). Harmonia axyridis invasion: UK distribution data 2004-2016. NERC Environmental Information Data Centre.


© Centre for Ecology & Hydrology (Natural Environment Research Council)


Study area
Temporal extent
2003-01-01    to    2016-12-31

Supplemental information

This dataset is referenced in:

Brown, P. M. J., Roy, D. B., Harrower, C., Dean, H. J., Rorke, S. L., & Roy, H. E. (2018). Spread of a model invasive alien species, the harlequin ladybird Harmonia axyridis in Britain and Ireland. Scientific Data, 5, 180239.

Other useful information regarding this dataset:

Provenance & quality

The data have come from direct observations from members of the public, who have submitted records through an online recording form. The majority of data are at 1km or better resolution. Records have been verified by expert entomologists from specimens or photographs, or have been received from accredited recorders. Coverage is complete, as known; media attention since the harlequin's arrival has increased the awareness of this species and ladybird recording.

Correspondence/contact details

Dr. Helen Roy
Centre for Ecology & Hydrology
Maclean Building, Benson Lane, Crowmarsh Gifford
OX10 8BB
United Kingdom


Roy, H.E.
Centre for Ecology & Hydrology
Brown, P.M.J.
Anglia-Ruskin University
Harrower, C.
Centre for Ecology & Hydrology
Dean, H.J.
Centre for Ecology & Hydrology
Rorke, S.L.
Centre for Ecology & Hydrology
Roy, D.B.
Centre for Ecology & Hydrology

Other contacts

Environmental Information Data Centre
NERC Environmental Information Data Centre


Spatial representation type
Tabular (text)
Spatial reference system
OSGB 1936 / British National Grid


Topic categories
biological invasions,  Britain citizen science,  Coccinellidae,  harlequin ladybird,  Harmonia axyridis invasive non-native species,  Invasive species UK
Species Distribution