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.

A well-travelled migrant, the painted lady arrives here every summer from Europe and Africa. This beautiful orange-and-black butterfly regularly visits gardens.

Mackerel are a sign of summer's arrival, when they appear inshore in huge numbers all around the UK. As well as being a sustainable seafood choice, they are an important food source for many…

Our smallest breeding seabird, the storm petrel is barely larger than a house martin! They mostly nest among rocks or in burrows on small offshore islands.

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

Red squirrels are native to the UK but are a lot rarer than their grey cousins. They live in a few special places across the UK thanks to reintroduction projects.

Dyer's greenweed is a classic plant of hay meadows, heaths and open woodlands. It has upright stems with loose clusters of bright yellow, pea-like flowers in summer.

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.

The brimstone moth is a yellow, night-flying moth with distinctive brown-and-white spots on its angular forewings. It frequently visits gardens, but also likes woods, scrub and grasslands.