The Sitka spruce was introduced into the UK from North America in the 19th century. It has been widely planted as a forestry tree; look for classic needle-like leaves and pale brown, domed cones…

Look out for this weevil on oak trees, where females lay their eggs inside acorns.

This big, beautiful fungus is a common one that can often be spotted popping out of trees.

Introduced from Japan in the 19th century, Japanese knotweed is now an invasive non-native plant of many riverbanks, waste grounds and roadside verges, where it prevents native species from…

These non-native limpets arrived from America in the 19th century and are now widespread in the UK. They form stacks and have a specially adapted shell which, when flipped upside down, looks like…

These beloved spiny mammals come out at night to hoover up beetles, worms and other invertebrates.