As the only crow with a red bill and red legs, the all-black chough is easy to identify. But it's harder to spot: there are only small, coastal populations in Scotland, Ireland, Wales,…

The large white is a common garden visitor - look out for its brilliant white wings, tipped with black.

Often seen carpeting the floor of ancient woodlands, Dog's mercury can quickly colonise, its fresh green leaves shading out rarer plants. It is also very poisonous.

These little critters are related to the woodlice you find in your garden and play a very important role on rocky shores.

The yellow flower heads of common ragwort are highly attractive to bees and other insects, including the cinnabar moth.