Hydroporus memnonius


Length 3.8 to 4.3 mm.  Sides more or less parallel. Colour may vary from rufous to almost black.

Identification difficulty
Recording advice

Unless identified by a recognised expert, a photo is required and the specimen should be examined with a microscope. In the comments box, state the key or ID method used and describe the size and identifying characters.


Canals, ponds and wet ditches.

When to see it

Peak time is April to October.

UK Status

Widespread and quite frequent in Britain.

VC55 Status

Frequent in Leicestershire and Rutland.

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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