12th October 2018

Harlequin Ladybirds- you may already have experienced the latest inundation of Harlequin Ladybirds. Thought to have benefitted from this hot summer, the populations are increased at this time of year by thousands drifting in on mild winds, from Asia. The most invasive species we have at present, this ‘invader’ first appeared in the UK in 2004- in ten years it has spread to areas which it took Grey Squirrels a hundred years to inhabit. Harlequin Ladybirds, on average larger than our 46 native species, and in a variety of patterns and colours and spot-numbers, have brown legs, and as such are distinguishable from the black-legged native species. They also reduce native Ladybirds, by out-competing for their aphid-food and by eating their eggs. Hibernating inside, unlike native Ladybirds, they give out a pheromone as the cooler weather arrives, which helps them detect other Harlequins, and gather in numbers inside our houses, and outbuildings. They do little harm though they may stain furniture and can deliver a small bite, which is harmless to all except a few who may have an allergic reaction. Conditions: Rain and strong winds arriving through the day. Temperature: Max 18 Min 17 C.

Harlequin Ladybirds

Harlequin Ladybird

Harlequin Ladybird

Harlequin Ladybirds

Advertisements