As its name suggests, Water dock likes damp places, such as the egdes of canals, ponds and rivers. It is a tall plant with large, greenish flower spikes.

The rare Slavonian grebe is an attractive diving bird with distinctive, golden ear tufts that give rise to its American name - 'horned grebe'.

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.

A scarce tree of England and Wales, the Large-leaved lime is the rarest of our native limes. It is tall and broad, and can be found in forests and parks, where it is frequently planted.

The dazzling silver-studded blue is a rare butterfly of heathland habitats, mainly in southern England. It has undergone severe population declines in recent years.

The sand lizard is extremely rare due to the loss of its sandy heath and dune habitats. Reintroduction programmes have helped establish new populations.