The tiny, grey-brown house mouse is one of our most successful mammals. It thrives around buildings but is less likely to be found in our houses these days due to better construction.

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 house sparrow is a familiar, streaky brown bird of towns, parks and gardens. Males sport a grey cap and black bib, the size of which indicates their status.

The giant house spider is one of our fastest invertebrates, running up to half a metre per second. This large, brown spider spins sheet-like cobwebs and pops up in the dark corners of houses,…

A familiar 'weed' of gardens, roadsides, meadows and parks, red clover has trefoil leaves and red, rounded flower heads. It is often used as fodder for livestock.

As its name suggests, Red bartsia does have a red tinge to its stem, leaves and small flowers. Look for it on roadside verges, railway cuttings and waste ground in summer.

A strikingly beautiful fish, it is not hard to see where the ‘red’ mullet gets its name from!

Just as the bluebells finish flowering in our woodlands, the rose-red blooms of red campion start to brighten up the woodland floor. Look for this pretty plant in hedges and roadsides, too.

The red grouse is an umistakeable bird - plump and round, with a gingery-red body as its name suggests. Found on upland heathlands, it is under threat from the nationwide, dramatic loss of these…

The red admiral is an unmistakable garden visitor. This black-and-red beauty may be seen feeding on flowers on warm days all year-round. Adults are mostly migrants, but some do hibernate here.

Red valerian was introduced in the 1600s from Europe, but is now naturalised in the UK. Its pinky-red flowers grow from old walls, roadside verges, railway cuttings and cliffs, and provide nectar…