It is a few years since harlequin ladybirds arrived in Yorkshire and they are now a common sight in the autumn as groups of adults enter houses in search of places to overwinter. This habit is the reason why the Americans refer to them as ‘halloween’ bugs. This year, hundreds of the larvae can be seen on the trunks of trees in the grounds of Ackworth School. The orange-and-black larvae find a suitable spot and settle down to change into a chrysalis.
Harlequins