Some reaches of this river which passes through Burn Bridge are protected with associated SSSIs and SINCs, and freshwater fish and crayfish are protected under various Acts.
There are sightings of red squirrel here as well as otters, badgers, and bats and recent surveys have also identified a healthy population of native white-clawed crayfish Austropotamobius pallipes within the aqueduct that flows into the reservoirs.
The Huerva is relatively little polluted in its upper course, hence endangered species like the Austropotamobius pallipes crayfish and fishes like Barbus haasi, Rutilus arcasii and Chondrostoma toxostoma are to be found in its waters.