The 
          Hornet is Britains largest wasp, even the smallest workers are bigger 
          than the queens of most other species, and the hornet queens are more 
          than an inch long. Apart from their size, they are easily identified 
          by their brown and orangy - yellow markings, as opposed to the normal 
          black and yellow of other wasps. Hornets are quite rare in the British 
          Isles, being mainly confined to well wooded areas of Southern England. 
          Like common wasps, they build their nests out of paper in hollow trees, 
          chimneys, wall cavities,banks etc. Sometimes they use the same site 
          year after year (although a completely new colony). Because of their 
          size hornets make a louder hum than wasps, but in spite of their reputation, 
          they are relatively docile and will rarely sting, but if they do you 
          will know about it...!
      Below 
        is a picture showing a hornet's nest built of paper combs, formed from 
        chewed up wood or plant fibres