Acilius sulcatus


A large water beetle (14 to 18 mm) with considerable colour variation. Although it is a distinctively marked species, there are some very similar species and care is needed with identification.

Identification difficulty

Temporary and permanent water bodies such as ponds and streams etc. A.sulcatus is able to fly it is not restricted to a single body of water. It is found in water bodies with high and low levels of vegetation showing no preference between the two.

When to see it

All year round.

UK Status

Widespread and fairly frequent in Britain.

VC55 Status

Fairly 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