Conchologists, and citizen scientists team up to seek out endangered mollusc species along River Thames

It is tiny, hairy and “German” – and it could be hiding underneath a piece of driftwood near you. Citizen scientists and expert conchologists are teaming up to conduct the first London-wide search for one of Britain’s most endangered molluscs.

The fingernail-sized German hairy snail (Pseudotrichia rubiginosa) is found in fragmented patches of habitat mostly along the tidal Thames.