Harmonia axyridis - Aggregating B
In fall Harlequin ladybirds try to find a good shelter for winter and form huge aggregations. Here are a few groups that aggregated behind the shutters of a mansion in the Dutch Hoge Veluwe district. A few fairly small groups behind every shutter, but at least around a thousand beetles in total.
Here's another one of the groups:
''Harmonia axyridis'' is a large coccinellid beetle. Its colour ranges from yellow-orange to black, and the number of spots between none and 22. It is native to eastern Asia, but has been artificially introduced to North America and Europe to control aphids and scale insects. It is now common, well known, and spreading in those regions, and has also established in South Africa and widely across South America.
It is commonly known as the harlequin ladybird . It is also known in North America.. more