Native oysters are a staple of our seas and our plates - but our love of their taste has lead to a sharp decline all around the UK.

Broom is a large shrub of heaths, open woodlands and coastal habitats. Like gorse, it has bright yellow flowers, but it doesn't have any spines and smells of vanilla.

Famed for its tapping in the middle of the night, supposedly heralding tragedy, the deathwatch beetle is a serious wood-boring pest. In houses, their tunnelling can cause major damage.

This small reddish-purple seaweed grows in small branching fans on rocky shores. It is widely used in the food industry - and might have been used to produce your ice cream, beer or even jelly!…

A small woodland and hedgerow tree, spindle is most striking in the autumn when clusters of bright pink-and-orange berries hang from its twigs, providing food for mice, birds and even Red Foxes.…

Holly is a much-loved evergreen tree - its shiny, spiky leaves and bright red berries being a favourite in Christmas decorations. Found in all kinds of habitats, it provides an important winter…

The Heath bumblebee is not only found on heathland, but also in gardens and parks. It nests in small colonies of less than 100 workers in all kinds of spots, such as old birds' nests, mossy…

The variable damselfly looks a lot like the azure damselfly, but is much less common throughout most of the UK.

As its name suggests, the shaggy inkcap, or 'lawyer's wig', has a woolly, scaly surface to its bell-shaped toadstools. It is very common and can be seen at the road side, in…