A fierce predator of small fish and flying insects, the brown trout is widespread in our freshwater rivers. It is has a golden body, flanked with pale-ringed, dark spots.

A regular in gardens, hunting around compost heaps and under stones, the brown centipede is a common minibeast. Despite its name, it has 15 pairs of legs - one on each segment of its body.

The wall brown or 'wall' gets its name from the fact it rests on any bare surface or wall! It can be found in open, sunny places like sand dunes, old quarries, grasslands and railway…

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.

Considered Britain's most threatened butterfly, the high brown fritillary can be only be found in a few areas of England and Wales.

Largely confined to the north of the UK, the rare pine marten is nocturnal and very hard to spot. Reintroductions are helping it make a comeback.

As its name suggests, the house martin can be spotted nesting in the eaves of houses in our towns and villages. Its intricate mud nests take days to build and are often returned to and used in…

The brown long-eared bat certainly lives up to its name: its ears are nearly as long as its body! Look out for it feeding along hedgerows, and in gardens and woodland.

Also known as the brown crab, this large crab is found around all UK shores and is identifiable by the distinctive pie-crust edge to its brown shell.