
Community identification
Horsehair Worm
Gordius robustus (representative species)
- Order & Family
- Gordioidea, Chordodidae/Gordiidae
- Size
- 10 to 35 centimeters in length, but only 1 to 3 millimeters thick
Natural Habitat
Freshwater environments such as ponds, streams, troughs, and moist soil
Diet & Feeding
Larvae are parasites of arthropods (crickets, cockroaches, beetles); adults do not eat
Behavior Patterns
Larvae develop inside a host; once mature, they manipulate the host's behavior to seek water, where the adult worm emerges to mate
Risks & Benefits
Harmless to humans, pets, and plants; benefit the ecosystem by regulating insect populations