Britain's canals were built for industry, but they are now helping the wildlife survive

Britain's 8,000 km canal network, built for industrial transport two centuries ago, now serves as a refuge for threatened wildlife like water voles and otters.

Canals behave like long, thin lakes with stable water levels and silty beds, providing steady habitat unlike dynamic natural rivers.

Water voles, which declined by over 90% by the 1990s and a further 39% from 2006–2022, find critical refuge in canal banks with calm waters and gentle slopes.

Conservation groups such as Warwickshire Wildlife Trust have modified sections of the Coventry and Oxford canals with coir rolls and ramps to aid water vole recovery.

Otters, once locally extinct across much of England, have returned to almost every county including urban canals, signaling improved water quality and potentially helping voles by preying on invasive mink.