Largely confined to the north of the UK, the rare pine marten is nocturnal and very hard to spot. However, it can be enticed to visit a peanut-laden birdtable.

The tiny, brown-and-white sand martin is a common summer visitor to the UK, nesting in colonies on rivers, lakes and flooded gravel pits. It returns to Africa in winter.

Common mallow is a handsome 'weed' of waste ground, roadside verges and gardens. Its deep pink, stripey flowers provide nectar for insects throughout the summer.

The Atlantic salmon spends most of its life at sea, but makes an epic journey back to the river or stream in which it hatched to spawn. Look out for it in freshwater rivers in the north and west…

Musk mallow has pretty pink flowers that can be seen along roadside verges, hedgerows and field margins in summer. It lives up to its name, producing a delicate, musky smell that increases indoors…