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.

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

Yn enwog am fod yn greaduriaid cyfrwys a llechwraidd, mae’r cŵn oren i goch yma â’u cynffonnau blewog i’w gweld mewn trefi ac yng nghefn gwlad. Maen nhw’n dod allan yn ystod y nos gan fwyaf ond i’…

The attractive roe deer is native to the UK and widespread across woodland, farmland, grassland and heathland habitats. Look for its distinctive pale rump and short antlers.

One of the most colourful fish in UK seas, the cuckoo wrasse looks like it belongs in the tropics. Don't be fooled though, it's very much a native species.

A scarce tree of England and Wales, the large-leaved lime is the rarest of our native limes. It is tall and broad, and can be found in forests and parks, where it is frequently planted.

Sand sedge is an important feature of our coastal sand dunes, helping to stabilise the dunes, which allows them to grow up and become colonised by other species.