Great Ramshorn Snail - Planorbarius corneus


Diameter 30 mm. The shell coils in a flat spiral. Their shells are various shades of brown with a reddish tinge caused by the presence of haemoglobin.

Identification difficulty

Inhabits small, still, weedy ponds and drains.

When to see it

All year round.

Life History

These snails graze on algae by scraping rocks with a special tongue with embedded teeth called a radula. They lay their eggs in a protective mass of jelly on plants or any other underwater structure.

UK Status

Fairly frequent in much of England, but fewer records from Wales and Scotland.

VC55 Status

Common in Leicestershire and Rutland.

Leicestershire & Rutland Map


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

UK Map