The Cicadellidae are a large family of plant-feeding bugs commonly known as leafhoppers. They belong to the order Hemiptera and are among the most abundant and diverse groups of insects, with over 20,000 known species found worldwide. Many species occur in the UK, where they are widespread in gardens, meadows, and woodland edges.

Leafhoppers are small, slender insects, usually 2–15 mm long, and often brightly coloured in greens, yellows, reds, or browns. They have wedge-shaped bodies, large eyes, and strong hind legs that allow them to leap long distances when disturbed — one of their most distinctive traits.

All leafhoppers feed on plant sap, which they extract with their piercing-sucking mouthparts. While most species cause little harm, some can damage crops or ornamental plants when present in large numbers, and a few are known to transmit plant diseases.

Leafhopper nymphs resemble small, wingless adults and are often found on the undersides of leaves, where they move quickly when touched. Adults are most active in spring and summer, and their sudden jumps from leaves are a familiar sight on warm days.

In the UK, leafhoppers can be found in a wide range of habitats, from lawns and hedgerows to woodland glades. Some of the most colourful species belong to the genus Eupteryx, often seen on herbs such as mint and sage.

Despite their small size, leafhoppers are an important part of grassland and garden ecosystems, providing food for birds, spiders, and other insects.