Bug Identifier
Horsehair Worm
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
See this bug in the Encyclopedia

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