Kristin Dorman-Johnson, National Park Service
Gary Averbeck, Veterinary Pathobiology, University of Minnesota
Size: Several inches to over 14 inches long
Description: Long, very slender worms. Sometimes found emerging from a large insect, e.g. grasshopper, or other anthropod.
Where/When: Found on the ground or on plants, especially near water sources, such as puddles, swimming pools, and horse troughs.
Significance: Beneficial as a recycler of decaying organic matter. Does not harm people or plants. Can sometimes be a nuisance indoors.