Common bird's-foot-trefoil
Common bird's-foot-trefoil has a vareity of names that conjure up some interesting images: 'Eggs and Bacon', for instance! Its small, yellow, slipper-like flowers can be seen in all kinds of grassy places.
Common bistort
Look for the delicate, pink flowers of Common bistort in wet meadows, pastures and roadside verges. It is also known as 'Pudding Dock' in North England because it was used to make a dessert at Eastertime.
Common blue
The common blue butterfly lives up to its name - it's bright blue and found in all kinds of sunny, grassy habitats throughout the UK! Look out for it in your garden, too.
Common blue damselfly
Living up to its name the Common blue damselfly is both very common and very blue. It regularly visits gardens - try digging a wildlife-friendly pond to attract damselflies and dragonflies.
Common box
Common box grows in woodlands and scrub in southern England, with notable populations in the Chilterns, Cotswolds and North Downs. A familiar evergreen tree, it has shiny, dark green, oval leaves.
Common brittlestar
This large brittlestar can be found in rockpools around much of the UK, but be gentle - its arms are very brittle and will break off if disturbed.
Common butterwort
The carnivorous lifestyle of common butterwort makes this heathland plant a fascinating species. Its leaves excrete a sticky fluid that tempts unsuspecting insects to land and become its prey.
Common carder bee
The common carder bee is a fluffy, gingery bumble bee that can often be found in gardens and woods, and on farmland and heaths. It is a social bee, nesting in cavities, old birds' nests and mossy lawns.
Common carp
The common carp is a very large fish that is popular with anglers due to its size and fighting spirit. It frequents ponds, gravel pits and lakes, but is not native to the UK, being introduced in the Middle Ages.
Common centaury
A low-growing plant of sand dunes, heaths and grassy places, Common centaury is in bloom over summer. Look for clusters of pretty, pink, five-petalled flowers.
Common chickweed
Look for the small, white, star-shaped flowers of Common chickweed all year-round. Sometimes considered a 'weed', it is still a valuable food source for insects.
Common club-rush
The dark green, straight and spiky stems of common club-rush or 'bulrush' are a familiar wetland sight. They are ideal for weaving and were traditionally used to make baskets, seats and mats.