The nuthatch is a tit-sized, grey and rust-coloured bird that can be easily spotted climbing headfirst down tree trunks in woodlands and parks.

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.

The migrant hawker is not a particularly aggressive species, and may be seen feeding in large groups. It flies late into autumn and can be seen in gardens, grasslands and woodlands.

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.

An attractive, olive-green bird, the greenfinch regularly visits birdtables and feeders in gardens. Look for a bright flash of yellow on its wings as it flies.

A breeding bird of fast-flowing, upland rivers, the grey wagtail can also be seen in lowland areas, farmyards and even towns in winter.

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