In Groombridge, the group said they were excited to find several mayfly larvae, key indicators of healthy water. Ellie ...

Data from caddisfly larvae, mayfly larvae and stonefly larvae provide key biological indicators of river health. Dr Liz Mattison, the estate's education and environment officer, said: "You can't ...

In Groombridge, the group said they were excited to find several mayfly larvae, key indicators of healthy water. Ellie Rotheray, a senior lecturer in ecology and evolution at the University of ...