The sweet chestnut is famous for its shiny brown fruits, or 'chestnuts', that are wrapped in a spiky, green casing and make a tasty winter treat. Look for this tree in woodlands in south…

The Leyland cypress, or 'Leylandii', is a notorious tree that has been widely planted for its fast-growing nature. It easily can get out of control, shading gardens at the expense of…

The spiked shieldbug has fearsome shoulder projections or 'spikes' and a predatory nature. This brown bug feeds on caterpillars and other insects in woodlands and on heathlands.

Escaped or intentionally freed from fur farms in the 1960s, the American mink is now well established in the UK. Its carnivorous nature is a threat to our native water vole and seabird populations…

The foxglove is a familiar, tall plant, with pink flower spikes and a deadly nature. In summer, it can be spotted in woodlands and gardens, and on moorlands, roadside verges and waste grounds.

A beautifully scented plant, the arching stems and bell-shaped flowers of Lily-of-the-valley can be seen in many woodlands. Despite its delicate appearance, this plant is highly toxic.

Found in ponds and marshes, the fragile look of the common water-measurer belies its fierce nature. A predator of small insects, it uses the vibrations of the water's surface to locate its…

Flowering in spring, the cylindrical, densely packed flower spikes of Sweet vernal-grass are easily spotted in a meadow. It also tastes of sweet vanilla and was once a favourite 'chewing…

The eel is famous for both its slippery nature and its mammoth migration from its freshwater home to the Sargasso Sea where it breeds. It has suffered dramatic declines and is a protected species…