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

Red squirrels are native to the UK but are a lot rarer than their grey cousins. They live in a few special places across the UK thanks to reintroduction projects.

Spot these tall, prehistoric looking birds standing like a statue on the edge of ponds and lakes, contemplating their next meal.

If you spot a crawling shell next time you're at the seaside, take a closer look… it might be a hermit crab!

This large, fluffy-looking moth is on the wing in July and August, but you might spot a caterpillar at almost any time of year.

Ground-elder was likely introduced into the UK by the Romans and has since become naturalised. A medium-sized umbellifer, it is an invasive weed of shady places, gardens and roadsides.

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

These moths can be seen flying on sunny days, but you're more likely to spot the fuzzy caterpillars crawling over paths.

Largely confined to the north of the UK, the rare pine marten is mostly nocturnal and very hard to spot. Reintroductions are helping it make a comeback.

As its name suggests, the scarlet elfcup is a bright red, cup-shaped fungus. It is widespread, but scarce, and can be found on fallen twigs and branches, in shady, damp places.