If you spot a crawling shell next time you're at the seaside, take a closer look… it might be a hermit crab!

Mae'r gwyn bach yn ymwelydd gardd cyffredin. Mae'n llai na'r gwyn mawr tebyg, ac mae ganddo lai o ddu ar flaen ei adenydd.

Herb-robert is a low-growing plant, with small, pretty, pink flowers. Look for it in shady spots in woodland, hedgerows and coastal areas.

Look for the deep magenta, star-shaped flowers of Marsh cinquefoil in marshes, bogs, fens and wetlands in the north, west and east of the UK.

Although they might not look it, sea cucumbers like this one belong to the Echinoderm group and are therefore closely related to starfish and sea urchins

The gatekeeper is on the wing in summer on grasslands, in woodlands and along hedgerows. Look out for the large, distinctive eyespot with two 'pupils' on each forewing.

Look for the round, cottony, purple flower heads of the Woolly thistle on chalk and limestone grasslands in summer. It is mainly found in Southern England.

Look for the pinky-white flowers of the dog-rose in summer, and its bright red rosehips in autumn. It is a scrambling shrub of hedgerows, woodlands and grasslands.

Look out for the bright red eyes of this speedy crab in rockpools - but be careful, they're notoriously feisty and will give a painful nip!

Look out for the small, yellow flowers of Celery-leaved buttercup in wet meadows and at the edges of ponds and ditches. It flowers from May to September.

Growing in tufts, Crested dog's-tail is a stiff-looking grass, with a tightly packed, rectangular flower spike. Look for it in lowland meadows and grasslands.

Fir clubmoss is a primitive plant found in rocky, moorland and mountain habitats. The stems of this tufted, upright fern look like tiny conifers.