This small duck is an uncommon winter visitor to the UK, where they're usually found on lakes, reservoirs and gravel pits.

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

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

Found on rocky shores and seabeds, the Keyhole limpet gets its name from the little hole at the tip of its shell.

A small colourful sea slug that can be found grazing on sea mats on the rocky shore and beyond the low water mark.

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

Found almost everywhere, the large yellow underwing is a night-flying moth that is often attracted to lights. It is brown with orangey-yellow hindwings.

This stocky wader is mostly a winter visitor to the UK, where it can be found on rocky, seaweed-covered coasts, often with groups of turnstones.

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

Field elm suffered declines due to the devastating effects of Dutch elm disease, but can still be found across much of the UK.