The beautiful demoiselle (Calopteryx virgo) disappeared from the River Mole during the 1960s owing to deteriorating water quality, but has since recolonised. The white-legged damselfly (Platycnemis pennipes) is also found along the river, and the downy emerald (Cordulia aenea) is found between Box Hill and Leatherhead. The Mole is one of only three locations in England where the river shingle beetle (Meotica anglica) is found.