The River Medway in England supports a rich variety of species:
Brown trout, rainbow trout, sea trout, grayling, chub, dace, roach, bream, tench, pike, perch, zander, eel.
Common frog, smooth newt, palmate newt, great crested newt.
Common lizard, grass snake, adder.
Mallard, tufted duck, pochard, gadwall, teal, wigeon, shoveler, mute swan, grey heron, goosander, kingfisher.
Water vole, brown rat, field vole, bank vole, hedgehog, fox, badger, otter.
This diversity reflects the river's ecological health and varied habitats.