Over six years, scientists monitoring badgers fitted with GPS collars in Co Wicklow found that one in five males roamed a typical territory of 975ac, compared with the rest of the badger population staying within their close group's territory of 425ac. In distance terms, a so-called "super ranging" badger will travel 1.4km in one night, encroaching on his neighbours' territory, while his companions cover only 830m."Badger movements into and out of neighbouring social groups is associated with increased prevalence of TB in these groups," scientists wrote in a new paper. "Super rangers may therefore act as super spreaders of TB infection."