These colourful little fish are a delight for snorkellers or shallow water divers to photograph, rarely being scared off by their presence!

This dazzling dragonfly, also known as the blue-eyed hawker, is a recent arrival to Britain.

Yellow corydalis is a familiar 'weed' of gardens, walls and rocky places. It is a garden escapee in the UK, so is not a native plant. Try choosing natives for your garden to prevent…

This beautiful bumblebee favours upland areas, but has declined in recent decades and is now nationally scarce.

This sponge is found on rocky shores around the UK and looks like a thick bready crust (if you use your imagination a bit!).

This glossy wading bird is a scarce visitor to the UK, though records have become more common in recent decades.

As its name suggests, Himalayan balsam is from the Himalayas and was introduced here in 1839. It now an invasive weed of riverbanks and ditches, where it prevents native species from growing.