Arrowhead is an aquatic plant of shallow water and slow-moving waterways. In bloom over summer, it displays small, white flowers, but it is the arrow-shaped leaves that are most distinctive.

Favouring shady spots in woodlands and hedgerows, Garlic mustard can grow very tall. It has small, white flowers and, as its name suggests, smells faintly of garlic.

Eyebright has small, white flowers with purple veins and yellow centres. It likes short grasslands, from clifftops to heaths, and is one of a number of species and hybrids that are hard to tell…

Living up to its name the Common blue damselfly is both very common and very blue. It regularly visits gardens - try digging a wildlife-friendly pond to attract damselflies and dragonflies.

The guelder-rose is a small tree of hedgerows, woods, scrub and wetlands. It displays large, white flowers in summer and red berries in autumn, which feed all kinds of birds, including Bullfinches…

Living up to its name, the long-tailed tit can be easily recognised by its long tail. It is a small, pretty, pink, black and white bird that can be seen in woodlands, gardens and parks.

Orca, sometimes known as ‘killer whales’, are unmistakable with their black and white markings. Although we do have a small group of orca who live in British waters, you would be lucky to see them…

Enchanter's nightshade is a hairy plant, with rounded leaves that taper to a fine tip, and clusters of small, pinky-white flowers in summer.

The male purple emperor is a stunning butterfly with a brilliant purple sheen. Look for it feeding around the treetops in woodlands, or on damp ground, animal droppings or even carrion in the…