Painter's Mussel - Unio pictorum


Typically 70-80mm long but can be over 100mm. Elongate with the length at least twice the height. The hinge is long, straight and horizontal. The shell is usually a yellow/olive colour with brown growth lines visible.

Similar Species

It is only likely to be confused with Unio tumidus.

Identification difficulty

Lowland rivers, canals, lakes and reservoirs.

When to see it

All year.

UK Status

Mainly found across England but not in Scotland nor the west of Wales.

VC55 Status


be our species champion

Leicestershire & Rutland Map


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

UK Map