The typical signs of rodent problems are:

  • Sightings of live or dead rats
  • Common rat droppings can be 12mm long and taper at both ends
  • Runs – rats follow the same routes when travelling and leave trails through the grass and low vegetation
  • Footprints and tail swipes – on muddy or dusty surfaces
  • Smears – dark grey marks left on surfaces by repeated contact with rat fur
  • Burrows – entrance holes 7-120mm in diameter in grassy banks, under tree roots, at the end of paving or drain cover surrounds
  • Nests – sometime found indoors, in lofts or under floorboards
  • Gnawing – rats gnaw continually, even on non-food materials, in order to wear down their front teeth