Our only venomous snake, the shy adder can be spotted basking in the sunshine in woodland glades and on heathlands.

One of the only venomous fish to be found in British waters, the lesser weever fish is certainly one to watch out for!

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.

Considered Britain's most threatened butterfly, the high brown fritillary can be only be found in a few areas of England and Wales.

The bright green ring-necked parakeet is an escapee and our only naturalised parrot; its success is likely due to warmer winters.

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

This stunning hermit crab has only returned to our southern shores in recent years. Let us hope it stays for good this time!