Hairworms - Nematomorpha

Alternative names
Gordion worms

Long, thin wire-like worms found in damp or aquatic habitats. They are not segmented. They are typically 50-100 mm in length and 1-2 mm in diameter. Identifying this group to species is very difficult but we have included representative images below to illustrate the phylum.

Similar Species

Nematodes are similar and could be confused, though these are usually shorter in length and much more mobile.

Identification difficulty

Damp and aquatic habitats.

When to see it

All year.

Life History

The larvae are parasitoids of various arthropods.

UK Status

Unknown - rarely recorded.

VC55 Status


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Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map