A plump gamebird, the red-legged partridge is an introduced species that seems to have settled here with little problem. It can be spotted in its favoured open scrub and farmland habitats.

The carnivorous lifestyle of the round-leaved sundew makes this heathland plant a fascinating species. The round leaves have sticky, 'dew'-covered tendrils that tempt in unsuspecting…

The carnivorous lifestyle of common butterwort makes this heathland plant a fascinating species. Its leaves excrete a sticky fluid that tempts unsuspecting insects to land and become its prey.

Fennel has feathery leaves and open, umbels of yellow flowers. It was probably introduced by the Romans for culinary use, and is now a naturalised species of verges, waste ground and sand dunes.…

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.

The jackdaw is a small, black-capped crow of woodlands, parks, towns and coast. It is a well-known thief, stealing other birds' eggs and breaking into garden feeders.

Cotoneaster was introduced to the UK in 1879 from Eastern Asia as an ornamental plant. It is now an invasive non-native species which is taking over valuable habitats including limestone…

Creeping buttercup is our most familiar buttercup - the buttery-yellow flowers are like little drops of sunshine peppering garden lawns, parks, woods and fields.

One of the prettiest hardy ferns, the lady fern is delicate and lacy, with ladder-like foliage. It makes a good garden fern, providing attractive cover for wildlife.

The smaller of our two UK seal species, common seals are also known as harbour seals. Despite being called "Common", they are actually less common than grey seals!

As the name suggests, the common medium stonefly is found in gravelly upland rivers and streams, often on bankside stones and plants. There are 34 species of stonefly in the UK, which are hard to…