A tall, domed tree of woodlands, hedgerows and parks, the introduced sycamore is familiar to many of us the 'helicopter' producing tree - its large, winged fruits appearing in autumn.…

A prickly, tall plant, the Small teasel is closely related to the Common teasel, but has much smaller, more rounded flower heads. It prefers damp, open woodlands.

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.

Look for common toadflax on waste ground and grassland, and along roadside verges and hedgerows. Its yellow-and-orange flowers are tightly packed on a tall spike and have distinctive 'spurs…

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

Favouring shady spots in woodlands and hedgerows, Garlic mustard can grow very tall. It has small, white flowers and, as its name suggests, smells faintly of garlic.

Standing proud and tall, the red deer is our largest deer. With its massive antlers, it is an unmistakeable icon of the Scottish Highlands, but can be seen in northwest and southern England, too…

A tall plant, Rosebay willowherb is a successful coloniser; it can form dense stands of bright pink flower spikes on disturbed ground, such as woodland clearings, verges and waste ground.

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.