Nematomorph worm (Horsehair worm)

Found in freshwater environments such as ponds, streams, and puddles; often seen on land emerging from host insects near water.

Larvae are parasitic on arthropods; adults do not eat and function solely for reproduction.

They are internal parasites of insects like crickets or beetles; when mature, they influence the host's nervous system to seek water, where they emerge to mate.

Harmless to humans, pets, and plants; beneficial to ecosystems by naturally controlling insect populations.