SPECIES ID / Invertebrates


True Flies


  • Over 17,000 species in North America, most terrestrial
  • 3500 species in 29 families are aquatic


  • Elongate and soft-bodied
  • No segmented legs or wing pads
  • Head may be a hardened capsule or reduced to just mouth parts

Primary Information Source:
Voshell, J. Reese. 2002. A Guide to Common Freshwater Invertebrates of North America. McDonald and Woodward Publishing Company. Blacksburg, Virginia.