Common laburnum is an introduced species, planted in parks and gardens. It is most recognisable in flower - its hanging bunches of yellow blooms giving it the name 'Golden rain'. It is…

As its name suggests, Himalayan balsam is from the Himalayas and was introduced here in 1839. It now an invasive weed of riverbanks and ditches, where it prevents native species from growing.

A pretty and distinctive little waterbird, the mandarin duck was introduced from the Far East as its name suggests. Oddly for a duck, it nests in trees, sometimes high above the water.

The yellow wagtail can be spotted running about, chasing insects on lowland damp marshes and meadows during summer. As its name suggests, it does wag its tail!

Creeping jenny is a low-growing plant of wet grasslands, riverbanks, ponds and wet woods. It has cup-like, yellow flowers and is a popular choice for garden ponds.

Although introduced by humans, the fallow deer has been here so long that it is considered naturalised. Look out for groups of white-spotted deer in woodland glades.

The brown long-eared bat certainly lives up to its name: its ears are nearly as long as its body! Look out for it feeding along hedgerows, and in gardens and woodland.

The small pearl-bordered fritillary is a pretty orange-and-brown butterfly of damp grassland, moorland, and open woodland. It gets its name from the row of 'pearls' on the underside of…

The nodding, pink-and-purple-chequered flowers of the snake's-head fritillary are said to resemble a snake, hence the name. Declining with the loss of our meadows, this delicate plant can be…

The pincushion-like, lilac-blue flower heads of Devil's-bit scabious attract a wide variety of butterflies and bees. Look for this pretty plant in damp meadows and marshes, and on riverbanks…

A fierce predator of small fish and flying insects, the brown trout is widespread in our freshwater rivers. It is has a golden body, flanked with pale-ringed, dark spots.

Buddleia is a familiar shrub, well-known for its attractiveness to butterflies. It is actually an introduced species, however, that has become naturalised on waste ground, railway cuttings and in…