Water Measurer Hydrometra stagnorum
(Linnaeus, 1758)

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Length about 13mm.


Description It has a very long, thin head, a slender body and antennae resemble a fourth pair of legs. Usually wingless but occasionally fully winged. It has a dark greyish or even black appearance. I

Life cycle

Able to easily walk on the surface of ponds and other still waters, it hunts insects trapped on, or just under the surface.

Habitat Ditches, ponds and slow moving streams. Found at vegetated margins of all types of water body, providing there are vertical emergent plant stems available as egg-laying sites.


  Hydrometra stagnorum 25164


Hydrometra stagnorum


Hydrometra stagnorum 25142


Hydrometra stagnorum