Cicada, [60], [89]

Clubionus, [90]

Coccinella (see [Ladybird])

Common Ladybird (see [Ladybird])

Common Mouse (see [Mouse])

Common Snail (see [Helix aspersa])

Common Wasp, [191], [240]–311

Condillac, Étienne Bonnot de, Abbé de Mureaux, [112]

Cotton-bee, [73], [12], [186]

Crabro-wasp, [91]–92, [103]