| Introduction |Identification Key |

Leech

Leeech Image
 
  • Measure 1.0 mm to 5.0 cm in length.
  • Typically dorsoventrally flattened.
  • Always have 34 segments.
  • Suckers at both ends.
  • Leeches are common in warm protected waters of lakes, ponds, streams, and marshes.
  • Leeches usually avoid light by hiding under rocks or among aquatic vegetation or detritus.
  • Silty substrates are unsuitable for leeches because they cannot attach properly.