• Girardia sp. is a common species, found in warm ponds, lakes, and rivers across North America.
• The full grown animals are on average 6-18mm long and 1-3mm wide.
• The head is triangular with a rounded anterior tip.
• The auricles are short and broad.
• The coloration on the dorsal side can vary and often times is almost uniformly brown with irregularly dispersed white splotches.
• The ventral side is less pigmented than the dorsal side.
• Their reproduction is asexual by fission.

Reference: R Kenk, Oceanography and Limnology Program (Smithsonian Institution), United States Environmental Protection Agency. Freshwater planarians (Turbellaria) of North America. Washington, U.S. Environmental Protection Agency, 1972.