The last thing you’d expect this extraordinary creature to be is a fish!

Once widespread, this attractive plant has declined as a result of modern agricultural practices and is now only found in four sites in South East England.

The sessile oak is so-called because its acorns are not held on stalks like those of the familiar English oak. It can be found in woodlands mainly in the north and west of the UK.

This bog-loving butterfly is mostly found in the north of the UK, where it takes to the wing in summer.

The tiny firecrest vies with the goldcrest for the title of the UK's smallest bird. Once just a visitor, the firecrest can now be found breeding in woodlands in the south of England.

The thresher shark is a migratory species and passes through UK waters in the summer months. If you’re lucky, you might see this magnificent shark jump high out of the water in to the air.

The song of the Roesel's bush-cricket is very characteristic: long, monotonous and mechanical. It can be heard in rough grassland, scrub and damp meadows in the south of the UK, but it is…

Only a few pairs of snow bunting breed here, so look out for this striking black-and-white bird in winter around Scotland, the North West and the East coast of England.

Their long narrow shells are a common sight on our shores, especially after storms, but the animals themselves live buried in the sand.