This small, white heron is an increasingly common sight in parts of the UK as it spreads north from continental Europe.

This slim fish is usually found on gravelly parts of the seabed, close to shore, but can turn up in rockpools.

A tall plant, purple-loosestrife can form dense stands of bright purple flower spikes in wet habitats like reedbeds, fens and marshes.

A tall and robust species of sedge, the Great fen-sedge has long leaves with sawtooth edges. It forms dense stands in lowland fens and around lakes.

The extensive, golden-brown reedbeds that are formed by stands of Common reed are a familiar sight in our wetlands. They provide an important home for many species, including the rare Bittern.

This dainty white butterfly is now only found in a few parts of Britain, where it flutters slowly through woodland clearings.

Star-of-Bethlehem' and 'wedding cakes' are just some of the other names for greater stitchwort. Look for its pretty, star-shaped, white flowers in woodlands and along hedgerows and…

A classic fern of woodlands across the UK, the male-fern is also a great addition to any garden. It grows impressive stands from underground rhizomes, dying back in autumn.

A tall plant, Rosebay willowherb is a successful coloniser; it can form dense stands of bright pink flower spikes on disturbed ground, such as woodland clearings, verges and waste ground.

The Sessile oak is so-called because its acorns are not held on stalks like those of the familiar English oak. It can be found in woodlands mainly in the north and west of the UK.