You are most likely to spot the cat flea if you have pets. It will feed on cats, dogs and people, although it can't live on us. It is a pest and needs to be controlled in the house for the…

The sinuous otter is an excellent swimmer and can be seen hunting in wetlands, rivers and along the coast - try the west coast of Scotland, West Wales, the West Country or East Anglia for the best…

This bumpy shell lives up to its name and lives partly buried in the seabed along the west coast of Great Britain.

The pied flycatcher is a summer visitor, migrating here from West Africa to breed. Look for this small, black-and-white bird in woodland, parks and gardens, mostly in the west of the UK.

A small fish found on rocky shores in the south and west of Britain.

Look out for this large, leafy lichen on trees in ancient woodlands in the west of the UK.

The thick topshell is a common sight on rocky shores in Wales and South West England.

This long-lived bivalve can be found buried in the sand on the south and west coasts of the UK.

This well-camouflaged wader is a winter visitor to the UK, where it can be seen feeding on wetlands with a distinctive bobbing motion.

This streaky brown bird is a summer visitor to Britain, favouring open woodlands in the north and west.