Horsehair worm

Damp soil or freshwater environments like puddles, troughs, and streams.

They do not eat as adults; larvae are internal parasites of insects like crickets or grasshoppers.

Adults emerge from their insect host when near water. They are known for knotting themselves into "Gordian knots."

Harmless to humans, pets, and plants; they help control populations of nuisance insects like crickets.