A fierce pirate of the sea, the great skua is renowned for stealing fish from other seabirds and dive-bombing anyone that comes near its nests. It breeds on the Scottish Isles.

This brown seaweed lives in the mid shore and looks a bit like bubble wrap with the distinctive air bladders that give it its name.

Freshwater pearl mussels spend their adult lives nestled in the river bed of fast flowing, rocky streams, filter feeding the water.

This large shieldbug lives up to its name, bristling with long pale hairs. It's a common sight in parks, hedgerows and woodland edges in much of the UK.

The large, dark grey water shrew lives mostly in wetland habitats. It's a good swimmer that hunts for aquatic insects and burrows into the banks.