Categories DavidHarlequin ladybird larva on a nettle leaf Post author By David Post date 11 July 2011 The young of a harlequin ladybird.These insects are the fastest spreading non-native species in Europe and the most invasive ladybird in the world. It is reckoned to threaten the survival of 1,000 native insect species. ← Two spot ladybird → Golden flies on a muddy pond bank