Living up to its name, the bullhead has a characteristically large, flattened head and a tapering body. Look out for it in fast-flowing, stony rivers and streams.

In summer, the 'frothy' flowers of lady's bedstraw can carpet the grasses of meadows, heaths and coasts with yellow and fill the air with a sweet, honey-like scent.

Listen out for the 'chattering' song of the reed warbler, while wandering the UK's lowland wetlands in summer. A small, brown bird, they are quite hard to see.

The Welsh poppy is a plant of damp and shady places, roadsides and hillsides. It is also a garden escapee. It flowers over summer, attracting nectar-loving insects.

A summer visitor, the willow warbler can be seen in woodland, parks and gardens across the UK. It arrives here in April and leaves for southern Africa in September.

Ever spotted a honeycomb-like mound on the beach and wondered what it was? It's a reef built entirely by worms!

Brittle stars, sea urchins and other starfish will want to stay out of the way of this speedy carnivorous starfish!

A summer visitor, the wheatear is a handsome chat, with black cheeks, white eyestripes, a blue back and a pale orange chest. Look for it on upland heaths and moors.

The shells of this small scallop are often found washed up on our shores and comes in lots of different colours, including pink, red, orange and purple.!

A plain-looking warbler, the garden warbler is a summer visitor to the UK. It is a shy bird and is most likely to be heard, rather than seen, in woodland and scrub habitats.

A well-travelled migrant, the painted lady arrives here every summer from Europe and Africa. This beautiful orange-and-black butterfly regularly visits gardens.