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'', most commonly known as the harlequin, multicolored Asian, or simply Asian ladybeetle, is a large coccinellid beetle. This is one of the most variable species in the world, with an exceptionally wide range of color forms. It is native to eastern Asia, but has been artificially introduced to North America and Europe to control aphids and scale insects.