This small, white heron is an increasingly common sight in parts of the UK as it spreads north from continental Europe.

The common octopus is a highly intelligent, active predator. It even has a secret weapon - special glands produce a venom that it uses to incapacitate its prey!

The UK's largest native grasshopper is also one of its rarest, found only on wetlands in a few parts of England.

Ground-elder was likely introduced into the UK by the Romans and has since become naturalised. A medium-sized umbellifer, it is an invasive weed of shady places, gardens and roadsides.

In April and May, our ancient woodlands are awash with the much-loved, nodding heads of the bluebell. Millions of bulbs can exist in just one wood, giving rise to the 'blue carpets' that…

The much-loved robin is a garden favourite and one of our most familiar birds, adorning Christmas cards every year. It is very territorial, however, and will defend its post with surprising…

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