The May bug or Cockchafer as it is otherwise known is a large, harmless beetle that appears in areas of the UK between the months of May and July. You will usually see them on warm evenings as they fly towards artificial light. If windows and doors are left open, they will fly into the house and although they don’t harm humans, they can be annoying. During the day, they can be observed feeding on leaves and crawling through grass which is where they lay their eggs.