The Asian ladybeetle is extremely varied in appearance. These four are all the same species but range from no spots to a few to many. Fortuitously, these ones congregated under the moth lights one night and formed this little 'social bubble', each one different!

While some people dislike them because they come into houses, this species was deliberately imported to control aphid infestations which they do quite well. I have seen adults and larvae munching effectively through aphid populations. They used to be sold in garden centres (perhaps still are) as a non-chemical control of aphids.