Nudibranchs, also known as sea slugs, are much like their land-based relatives that you may spot in your garden. But, unlike your regular garden slug, the nudibranch can incorporate the stinging…

The chocolate-brown, plump dipper can often be seen bobbing up and down on a stone in a fast-flowing river. It feeds on underwater insects by walking straight into, and under, the water.

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

The small white is a common garden visitor. It is smaller than the similar large white, and has less black on its wingtips.

A breeding bird of fast-flowing, upland rivers, the grey wagtail can also be seen in lowland areas, farmyards and even towns in winter.

The colourful and delightful chaffinch is a regular garden visitor across the UK. Look out for it hopping about on the ground under birdtables and hedges.

The common octopus is a highly intelligent, active predator. It even has a secret weapon - special glands produce a venom that it uses to incapacitate its prey!

A non-native species originating from Asia, the harlequin ladybird is prevalent in towns and gardens.