Cleavers
Familiar as the bristly plant that easily hooks on to our clothing as we walk through the countryside or do the gardening, cleavers uses its hooks to help it climb and to disperse its seeds.
Clouded yellow
The clouded yellow is a migrant that arrives here from May onwards. Usually, only small numbers turn up, but some years see mass migrations. It prefers open habitats, particularly chalk grassland.
Coal tit
The coal tit is mainly found in coniferous woodland, but can also be spotted in gardens and parks. It is smaller than the great tit, but has a similar bicycle pump-like song.
Cock's-foot
Cock's-foot is a common, tussocky grass of grasslands, woodland rides and cultivated ground - its fluffy, pinky-beige flower heads are quite distinctive.
Cockle
The common cockle is a traditional seaside favourite, both for its white shells often found in the sand and for the yummy snack of cockles doused in malt vinegar.
Cold-water coral
Did you know that there are coral reefs in the UK? UK seas are home to some amazing cold-water corals that form reefs on the seabed over 400m deep.
Collared dove
The collared dove is a pretty little pigeon that is a regular sight in our gardens, woodlands and parks. Listen out for its familiar cooing call, which you may hear before you see the bird itself.
Colt's-foot
Looking like a short Dandelion, but with a much rounder middle, Colt's-foot is a 'weed' of waste ground and field edges that brightens up early spring with its sunshine-yellow flower heads.
Columbine
The bonnet-shaped, violet-blue flowers of Columbine can be spotted in damp areas in woodlands and in fens. It is also an attractive and much-loved garden plant.
Comma
The comma has distinctively ragged wing edges, which help to camouflage it - at rest, it looks just like a dead leaf! It prefers woodland edges, but can be spotted feeding on fallen fruit in gardens.
Common backswimmer
The fearsome common backswimmer hunts insects, tadpoles and fish. It uses its oar-like legs to swim upside-down under the water's surface where unsuspecting prey can be found.
Common banded hoverfly
The Common banded hoverfly has a fitting name: it is not only one of our most common species, its black body is also covered in yellow bands! It can be seen in many habitats from gardens to woodlands.