This dashing diving duck is a winter visitor to the UK's seas, coastal lakes and occasionally inland water bodies.

This large shrike visits the UK in small numbers each year, passing through on migration or spending the winter here.

This well-camouflaged woodpecker used to be a common breeding bird in Britain, but is now only likely to be seen passing through on migration.

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.

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!