The white-letter hairstreak gets its name from the white lines that form a 'W' shape on its underside. It is an elusive butterfly, spending much of its time in the treetops.

The Norway spruce was introduced into the UK from Scandinavia in the 16th century. It is familiar to us all as the 'original' Christmas tree and displays hanging, reddish-brown, oblong…

Look out for the black guillemot all year-round at scattered coastal sites in Scotland, England, Wales and the Isle of Man. It tends not to travel far between seasons, breeding and wintering in…

The graceful great crested grebe is a familiar sight on our lakes and reservoirs, and is well-known for its elaborate courtship dance, during which it rises vertically out of the water and shakes…

The green sandpiper is a very rare breeding bird in the UK, and is mainly seen on migration in autumn. Look out for it feeding around marshes, flooded gravel pits and rivers. It even likes sewage…

Parsley fern lives up to its name - the pale green fronds form in clusters among rocks and look just like parsley. Look out for it in upland areas, particularly in Wales and Cumbria.

It's easy to see where the snakelocks anemone got its name when you spot its flowing tentacles. But be careful when out rockpooling, those tentacles give a nasty sting!

The ringlet gets its name from the small rings on the undersides of its wings. These rings show variation in the different forms of this species, even elongating into a teardrop shape.

This slender shark gets its name from the spines in front of its dorsal fin. It can use these spines to defend itself by curling in a bow and striking at a predator.

The red-throated diver lives up to its name - the distinctive red patch on its throat heralds the breeding season. In summer, it nests in Scotland, but look out for it around the UK's coast…

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.