This charming little warbler is an increasingly common sight in autumn, when migrants pass through the UK.

This sponge is found on rocky shores around the UK and looks like a thick bready crust (if you use your imagination a bit!).

This distinctive lark is a passage migrant and winter visitor to the UK, most often found along the east coast of Britain.

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

A much-loved garden bird, the blackbird is famous for its harmonious song. In winter, our resident birds are joined by migrants from Scandinavia and the Baltics.

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.

A well-travelled migrant, the painted lady arrives here every summer from Europe and Africa. This beautiful orange-and-black butterfly regularly visits gardens.

The exotic and beautiful swallowtail is the UK's largest butterfly. A strong flier, residents can be spotted over wetlands in Norfolk during summer. Migrants occasionally appear in southern…