Freshwater pearl mussels spend their adult lives anchored to the river bed, filtering water through their gills and improving the quality of the water for other species.

Introduced from Japan in the 19th century, Japanese knotweed is now an invasive non-native plant of many riverbanks, waste grounds and roadside verges, where it prevents native species from…

This small finch nests on moorlands and coastal crofts, spending the winter on the coast. The UK population has declined dramatically.

The coal tit is mainly found in coniferous woodland, but can also be spotted in gardens and parks. It is smaller than the great tit, but has a similar bicycle pump-like song.