Although introduced by humans, the fallow deer has been here so long that it is considered naturalised. Look out for groups of white-spotted deer in woodland glades.

One of our commonest willows, the Goat willow is a small tree that is found in ditches, reedbeds and wet woodland. It is well-known for its silver, fluffy catkins that give it another name, '…

One of our commonest willows, the Grey willow is a small tree that is found in ditches, reedbeds and wet woodland. It is well-known for its silver, fluffy catkins that give it another name, '…

The willow tit lives in wet woodland and willow carr in England, Wales and southern Scotland. It is very similar to the marsh tit, but has a distinctive pale panel on its wings.

As the bluebells fade, yellow archangel takes its turn to impress, with golden-yellow flowers carpeting our ancient woodlands.

The Yellow slug lives up to its name - its yellow body is mottled with grey patches. Often found in gardens and damp places in houses, it can be considered a pest, but is an important nutrient…

So-named for the silvery-white appearance of its leaves, the White willow can be seen along riverbanks, around lakes and in wet woodlands. Like other willows, it produces catkins in spring.

The large, sunshine-yellow flowers of the yellow iris brighten up the margins of our waterways, ponds, wet woods, fens and marshes. Also called the 'flag iris', its outer petals have a…