Posted on 11 July 2011 by David Harlequin ladybird larva on a nettle leaf 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. Post navigationPrevious post: Two spot ladybirdNext post: Golden flies on a muddy pond bank