![]() In others, the eggs hatch in the water and the tiny larvae enter the body of an arthropod (insects and their relatives) living in the water or along the water’s edge. In some species, insects become infected when they eat plants with attached eggs. The worms deposit their eggs in strings in the water, often on water plants. They are often found slowly writhing in a tangled knot (named after the Gordian knot of ancient Greek legend). In some species the rear end of the body ends in two or three lobes. Typically they are 20 to 30 centimeters long (8-12 inches) but only 1 millimeter wide. Unlike earthworms, their bodies are not segmented. The marine forms are in the Class Nectonematoida, while terrestrial and fresh water forms are in the Class Gordioida. These animals constitute the Phylum Nematomorpha. ![]() ![]() They do not harm people, pets, or plants. They have turned up in bird baths, water troughs, wet sidewalks, toilets, and crops in moist soil. In New Hampshire they are mostly found during the late spring and summer. Horsehair worms are very long, slender parasites of insects that are found in moist places.
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